Alternatives to Refraction
Compare Refraction alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to Refraction in 2025. Compare features, ratings, user reviews, pricing, and more from Refraction competitors and alternatives in order to make an informed decision for your business.
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1
Windsurf Editor
Windsurf
The Windsurf Editor is a free AI-powered IDE and AI coding assistant that accelerates development by providing intelligent code generation and agents in over 70 programming languages and more than 40 IDEs, including VSCode, JetBrains, and Jupyter Notebooks. With Windsurf, developers can write code faster, eliminate repetitive tasks, and stay in the flow state—whether they're working with Python, JavaScript, C++, or any other language. Built on billions of lines of open-source code, Windsurf Editor understands and anticipates your coding needs, offering multiline suggestions, automated unit tests, and even natural language explanations for complex functions. It’s perfect for streamlining code writing, reducing boilerplate, and cutting down the time spent on documentation searches. Trusted by individual developers and Fortune 500 companies alike, Windsurf Editor is your go-to solution for boosting productivity and writing better code. Try Windsurf for free today!">
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2
Testim
Tricentis
Testim is the fastest path to resilient end-to-end tests—codeless, coded or both. Testim lets you create amazingly stable codeless tests that leverage our AI, but also the flexibility to export tests as code. You can leverage Testim’s modern JavaScript API and your IDE to debug, customize or refactor tests. Store them in your version control system to keep them in sync with branches and run tests on every commit. Run parallel, cross-browser tests on our test cloud or Selenium-compatible grids while integrating with your CI and dev tools to run smoke tests on pull requests, end-to-end tests on release candidates, or full regression suites on a schedule. Customers like Microsoft, Salesforce, NetApp, Wix, and JFrog run millions of tests on Testim each month. Learn more on our website and sign up for your free account!Starting Price: $20,000 a year -
3
PhpStorm
JetBrains
The Lightning-Smart PHP IDE. PhpStorm deeply understands your code. PhpStorm is perfect for working with Symfony, Laravel, Drupal, WordPress, Zend Framework, Magento, Joomla!, CakePHP, Yii, and other frameworks. The editor actually 'gets' your code and deeply understands its structure, supporting all the PHP language features for modern and legacy projects. It provides the best code completion, refactorings, on-the-fly error prevention, and more. Make the most of the cutting edge front-end technologies, such as HTML 5, CSS, Sass, Less, Stylus, CoffeeScript, TypeScript, Emmet, and JavaScript, with refactorings, debugging, and unit testing available. See the changes instantly in the browser thanks to Live Edit. Perform many routine tasks right from the IDE, thanks to the Version Control Systems integration, support for remote deployment, databases/SQL, command-line tools, Docker, Composer, REST Client, and many other tools.Starting Price: $199 per user per year -
4
Tabnine
Tabnine
Tabnine is the AI coding assistant that you control — helping development teams of every size use AI to accelerate and simplify the software development process without sacrificing privacy, security, or compliance. Tabnine boosts engineering velocity, code quality, and developer happiness by automating the coding workflow through AI tools customized to your team. Tabnine is trusted by more than 1,000,000 developers across thousands of organizations. Tabnine offers best-in-class AI code completion and an AI-powered chat and supports numerous use cases such as code generation, explanation of code, creating unit tests, generating documentation, debugging code, refactoring and maintaining code. Tabnine is integrated with all the major IDEs such as VS Code, JetBrains, Visual Studio, Eclipse. It supports over 80 programming languages and frameworks including JavaScript, Python, Java, PHP, Go, and more.Starting Price: $12 per user per month -
5
REST United
REST United
REST United is a platform that simplifies the process of generating Software Development Kits (SDKs) for REST APIs across multiple programming languages, including PHP, Python, Ruby, ActionScript (Flash), C#, Android, Objective-C, Scala, and Java. In just five simple steps, users can create SDKs accompanied by highly customizable documentation featuring easy-to-follow example code, enhancing developer engagement. The platform also leverages the Postman Chrome plug-in to facilitate testing and debugging of REST APIs, streamlining the development workflow. For those designing their own REST APIs using frameworks like Node.js, Ruby Sinatra, Scala Scalatra, or Java JAX-RS, REST United offers assistance in generating server-side code. Support is readily available, with the promise of responses within 12 hours to any inquiries. Overall, REST United aims to make REST API development more accessible and efficient by providing tools that bridge the gap between API design and implementation.Starting Price: $1 per month -
6
JetBrains Aqua
JetBrains
Aqua is the first IDE created specifically for test automation. It‘s an all-in-one workspace that supports Selenium, Cypress, and Playwright. Aqua is a polyglot IDE that understands Java, Python, JavaScript, TypeScript, Kotlin, and SQL. Get straight to testing without having to install and configure lots of plugins. Aqua boasts a unique feature set containing everything a test automation engineer needs on a daily basis. Aqua’s Web Inspector works like a built-in browser and allows you to capture any page element without switching to another tool. There is also the HTTP client for API testing and integration with databases, Docker, and version control. Aqua minimizes the hassle for even the most challenging tasks. The combination of intelligent code analysis, powerful search and refactoring capabilities, and overall ease of use enables you to boost your quality engineering productivity.Starting Price: $249 per year -
7
Qt Creator
Qt Group
Qt Creator's advanced code editor lets you code in C++, QML, JavaScript, Python and other languages. It features code completion, syntax highlighting, refactoring and has built-in documentation at your fingertips. Qt Creator integrates with most popular version control systems, including Git, subversion, perforce, and mercurial. Integrated visual editors for building C++ widget-based applications or fluid Qt Quick-based animated UIs with ready-made controls. Import an existing project or create one from scratch – Qt Creator generates all the necessary files. Support for Cmake and cross-compiling with qmake is included. Build for and run your software on desktop, mobile and embedded operating systems. The build settings allow you to easily switch between targets. Test and debug applications in conditions practically identical to those on your target device.Starting Price: $83 per month -
8
PHPUnit
PHPUnit
PHPUnit requires the dom and json extensions, which are normally enabled by default. PHPUnit also requires the pcre, reflection, and spl extensions. These standard extensions are enabled by default and cannot be disabled without patching PHP’s build system and/or C sources. The code coverage report feature requires the Xdebug (2.7.0 or later) and tokenizer extensions. Generating XML reports requires the xmlwriter extension. Unit Tests are primarily written as a good practice to help developers identify and fix bugs, to refactor code and to serve as documentation for a unit of software under test. To achieve these benefits, unit tests ideally should cover all the possible paths in a program. One unit test usually covers one specific path in one function or method. However a test method is not necessarily an encapsulated, independent entity. Often there are implicit dependencies between test methods, hidden in the implementation scenario of a test.Starting Price: Free -
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ZZZ Code AI
ZZZ Code AI
ZZZ Code AI is an AI-powered coding assistant designed to support developers across various programming tasks. It offers a suite of tools, including AI Code Generator, AI Bug Detector, AI Code Explainer, AI Code Refactor, AI Code Review, AI Code Converter, and AI Code Documentation. It supports multiple programming languages such as Python, C#, C++, Java, JavaScript, HTML, CSS, SQL, and Excel formulas. Users can input their coding requirements or questions, and the AI provides instant responses, code snippets, explanations, or conversions as needed. Specialized tools are available for specific languages and frameworks, including Dapper and Entity Framework Core. It is accessible online without the need for account creation, although character limits apply to prevent abuse. ZZZ Code AI aims to enhance productivity and reduce errors for both novice and experienced developers by automating routine coding tasks and providing immediate assistance.Starting Price: Free -
10
Nova
Panic
If we're being honest, Mac apps are a bit of a lost art. There are great reasons to make cross-platform apps — to start, they're cross-platform — but it's just not who we are. Founded as a Mac software company in 1997, our joy at Panic comes from building things that feel truly, well, Mac-like. Long ago, we created Coda, an all-in-one Mac web editor that broke new ground. But when we started work on Nova, we looked at where the web was today, and where we needed to be. It was time for a fresh start. It all starts with our first-class text-editor. It's new, hyper-fast, and flexible, with all the features you want: smart autocomplete, multiple cursors, a Minimap, editor overscroll, tag pairs and brackets, and way, way more. For the curious, Nova has built-in support for CoffeeScript, CSS, Diff, ERB, Haml, HTML, INI, JavaScript, JSON, JSX, Less, Lua, Markdown, Perl, PHP, Python, Ruby, Sass, SCSS, Smarty, SQL, TSX, TypeScript, XML, and YAML. -
11
BaseRock AI
BaseRock AI
BaseRock.ai is an AI-driven software quality platform that automates unit and integration testing, enabling developers to generate and execute tests directly within their preferred IDEs. It leverages advanced machine learning models to analyze codebases, producing comprehensive test cases that ensure optimal code coverage and quality. By integrating seamlessly into CI/CD pipelines, BaseRock.ai facilitates early bug detection, reducing QA costs by up to 80% and boosting developer productivity by 40%. Its features include automated test generation, real-time feedback, and support for multiple programming languages such as Java, JavaScript, TypeScript, Kotlin, Python, and Go. BaseRock.ai offers flexible pricing plans, including a free tier, to accommodate various development needs. It is trusted by leading enterprises to enhance software quality and accelerate feature delivery.Starting Price: $14.99 per month -
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CoffeeScript
CoffeeScript
Underneath that awkward Java-esque patina, JavaScript has always had a gorgeous heart. CoffeeScript is an attempt to expose the good parts of JavaScript in a simple way. The golden rule of CoffeeScript is: “It’s just JavaScript.” The code compiles one-to-one into the equivalent JS, and there is no interpretation at runtime. You can use any existing JavaScript library seamlessly from CoffeeScript (and vice-versa). The compiled output is readable, pretty printed, and tends to run as fast or faster than the equivalent handwritten JavaScript. Most modern JavaScript features that CoffeeScript supports can run natively in Node 7.6+, meaning that Node can run CoffeeScript’s output without any further processing required. This list may be incomplete, and excludes versions of Node that support newer features behind flags; please refer to node.green for full details. You can run the tests in your browser to see what your browser supports.Starting Price: Free -
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pell
pell
pell the simplest and smallest WYSIWYG text editor for web, with no dependencies. Easily customizable with the sass file (pell.scss) or overwrite the CSS. Its build in pure JavaScript, no dependencies and its written in ES6. -
14
Emergent
Emergent.sh
Emergent.sh is an AI-powered, agentic workspace designed to amplify creativity, remove roadblocks, and redefine software development. It offers an all-in-one platform where developers can plan, code, test, and deploy applications seamlessly. Key features include code maintenance and refactoring, such as automating library upgrades, simplifying migrations, and refactoring codebases. For application development and testing, Emergent.sh aids in resolving frontend bugs, integrating SaaS quickly, and boosting testing coverage. In data warehousing, it streamlines migrations, builds efficient ETL pipelines, and preprocesses data effortlessly. Additionally, it supports maintaining documentation, building internal tools, and automating scripting tasks. Backed by Y Combinator, Emergent.sh aims to unlock the future of software development by providing developers with a workspace that enhances productivity and innovation. -
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QF-Test
Quality First Software
QF-Test is an established tool for professional UI test automation of Desktop, Web & Mobile Applications as well as PDF documents. QF-Test is a low-code GUI test tool that allows to efficiently create test cases, e.g. using Capture/Replay, without any programming knowledge across platforms on Windows, Linux and macOS. For software developers, Jython, Groovy or JavaScript offer advanced scripting possibilities. Tests can be run automatically via continuous integration tools such as Jenkins and generate detailed reports. Robust & stable regression tests for various UI technologies can be created. QF-Test supports all types of Java GUIs, ranging from Swing (including ULC, JIDE components, CaptainCasa), its successor JavaFX, as well as the Standard Widget Toolkit (SWT) and Eclipse, including plugins and RCP applications. Use QF-Test to test dynamic web applications based e.g. on Angular, React, including Electron & hybrid applications using e.g. JxBrowser. Supports accessibility testingStarting Price: $2435.00/one-time -
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HUnit
Hackage
HUnit is a unit testing framework for Haskell, inspired by the JUnit tool for Java. It's easy to use HUnit, assuming you are familiar with Haskell, though not necessarily with JUnit. A test-centered methodology for software development is most effective when tests are easy to create, change, and execute. The JUnit tool pioneered support for test-first development in Java. HUnit is an adaptation of JUnit to Haskell, a general-purpose, purely functional programming language. With HUnit, as with JUnit, you can easily create tests, name them, group them into suites, and execute them, with the framework checking the results automatically. Test specification in HUnit is even more concise and flexible than in JUnit, thanks to the nature of the Haskell language. HUnit currently includes only a text-based test controller, but the framework is designed for easy extension. Run the tests as a group.Starting Price: Free -
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MATLAB
The MathWorks
MATLAB® combines a desktop environment tuned for iterative analysis and design processes with a programming language that expresses matrix and array mathematics directly. It includes the Live Editor for creating scripts that combine code, output, and formatted text in an executable notebook. MATLAB toolboxes are professionally developed, rigorously tested, and fully documented. MATLAB apps let you see how different algorithms work with your data. Iterate until you’ve got the results you want, then automatically generate a MATLAB program to reproduce or automate your work. Scale your analyses to run on clusters, GPUs, and clouds with only minor code changes. There’s no need to rewrite your code or learn big data programming and out-of-memory techniques. Automatically convert MATLAB algorithms to C/C++, HDL, and CUDA code to run on your embedded processor or FPGA/ASIC. MATLAB works with Simulink to support Model-Based Design. -
18
Sweep AI
Sweep AI
Spend time reviewing code generated by AI, not writing it. Sweep generates repository-level code at your command. Cut down your dev time on mundane tasks, like tests, documentation, and refactoring. Review all changes by Sweep, directly in Github, and comment if any changes need to be made. Push the commit if all looks good. All you have to do is write a ticket, and Sweep will do all of the heavy-lifting for you, allowing you to focus on the more important engineering problems. -
19
ColdFusion Builder
Adobe
Build with a lightweight, quick-loading IDE that complements Adobe ColdFusion. Finish faster with tools that help you to develop, test, debug and deploy applications. Automatically detect vulnerabilities in your code. Identify bottlenecks with reports from the Performance Monitoring Toolset. Ride the wave, easily develop, test, debug and deploy mobile and browser-based applications, and get a head start in the fast-growing apps market. Keep it safe, use debugging, refactoring, preview and other smart features for identifying security vulnerabilities, and maintain the integrity of your code. Streamline your work, use extensions, remote project support, integrated server management, a log viewer, and more, and take charge of your environment. Accelerate your application development with intelligent, ordered code assist for CFML, CFScript, HTML, JavaScript and CSS. Get code assist even for third-party JavaScript libraries included in your web application.Starting Price: $299 one-time payment -
20
WebStorm
JetBrains
WebStorm is a powerful JavaScript and TypeScript integrated development environment (IDE) designed to boost developer productivity and enjoyment. It comes ready to use out of the box with essential tools for JavaScript, TypeScript, HTML, CSS, and popular frameworks like React, Angular, and Vue. WebStorm offers deep code understanding, fast navigation, safe refactoring, and built-in Git support. It automates complex tasks such as resolving merge conflicts and debugging tests, saving developers time. The IDE integrates advanced AI-powered coding assistance, including unlimited code completion and offline support. WebStorm’s customizable interface and plugin ecosystem make it adaptable to any developer’s workflow.Starting Price: $129 per user per year -
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CodeRush
DevExpress
Try your first CodeRush feature right now and see instantly just how powerful it is. Refactoring for C#, Visual Basic, and XAML, with the fastest test .NET runner available, next generation debugging, and the most efficient coding experience on the planet. Quickly find symbols and files in your solution and easily navigate to code constructions related to the current context. CodeRush includes the Quick Navigation and Quick File Navigation features, which make it fast and easy to find symbols and open files. Using the Analyze Code Coverage feature, you can discover what parts of your solution are covered by unit tests, and find the at-risk parts of your application. The Code Coverage window shows percentage of statements covered by unit tests for each namespace, type, and member in your solution.Starting Price: $49.99 one time payment -
22
Amazon Q Developer
Amazon
The most capable generative AI–powered assistant for software development. To accelerate building across the entire software development lifecycle, Amazon Q agents can autonomously perform a range of tasks–everything from implementing features, documenting, testing, reviewing, and refactoring code, to performing software upgrades. Amazon Q Developer makes the whole development lifecycle easier. Amazon Q Developer is an expert on AWS and is in the console to help optimize your cloud costs and resources, provide guidance on architectural best practices, investigate operational incidents, and diagnose and resolve networking issues. Amazon Q Developer agents accelerate large-scale enterprise workload transformations, including .NET porting from Windows to Linux, mainframe application modernization, VMware workload migration and modernization, and Java upgrades to streamline processes and reduce costs.Starting Price: $19/month -
23
SPOJ
Sphere Online Judge
The SPOJ platform is centered around an online judge system, which serves for the automatic assessment of user-submitted programs. Some of its most important features include support for more than 45 programming languages and compilers, including C, C++, Pascal, JAVA, C#, Perl, Python, Ruby, Haskell, Ocaml, and esoteric languages. A rapidly growing problem-set of about 13000 tasks available for practice 24hours/day (in English, Polish, Vietnamese, Portuguese and other languages), including many original tasks prepared by the community of expert problemsetters associated with the project. A flexible testing system, supporting dynamic interaction with submitted programs and highly customisable output of assessment results. Intuitive browser-based content management which allows users to set up their own contests within a matter of minutes, and to make use of tasks already available in the system. More than 2400 contests hosted as of 2012. -
24
Ping-API
Ping-API
Use our generator to create a test script in JavaScript or CoffeeScript. Write script to set the request parameters and validate the response. Ping-API will run your test script on global servers in U.S., Japan, Germany and Singapore. Schedule testing to inspect your APIs. We will send the failure test information to you with email, Slack and HipChat. Ping-API allows you to write test script in JavaScript and CoffeeScript to test your APIs. Write script to set request url parameters, headers and body. And write script to validate response headers and body. Script generator. Don't worry about programming. Just set parameter of your API, the generator will give you test script. It is easy! The use case for web developers. Give me a notification when my web is down or the response is unexpected. Ping-API will schedule your tests in every minutes or hours. If the test is failure, we will send the notification to you.Starting Price: $5 per month -
25
SAP Build Code
SAP
Generative AI-based code development with Joule copilot, optimized for Java and JavaScript application development. SAP Build Code, generative AI-based code development with Joule copilot, optimized for Java and JavaScript application development, providing a turn-key environment for coding, testing, integrations, and application lifecycle management. Use AI to generate code and app logic aligned with SAP-centric programming models from natural language descriptions. Create data models and sample data conforming to apps with Joule copilot. Produce rapid unit tests with AI for existing code to increase quality and precision. Enable fusion team development by sharing application components, such as user experience, business logic, and processes. Drive secure collaboration with unified governance and simplified application lifecycle management for professional and citizen developers. Generative AI-code development with Joule copilot. -
26
Visual Studio
Microsoft
Microsoft Visual Studio is the industry-leading integrated development environment (IDE) for building modern applications across desktop, mobile, cloud, and web. It empowers developers to write, refactor, debug, test, and deploy software faster with intelligent assistance powered by GitHub Copilot and AI-driven workflows. With Agent Mode, developers can automate repetitive coding tasks, optimize performance, and receive contextual help directly in the IDE. The suite includes Visual Studio 2022, the comprehensive IDE for .NET and C++ development on Windows, and Visual Studio Code, the lightweight, cross-platform editor supporting JavaScript, Python, and dozens of other languages. Visual Studio integrates seamlessly with Azure, GitHub, and CI/CD pipelines, enabling teams to collaborate and ship code efficiently. Trusted by millions worldwide, Visual Studio provides the tools and intelligence developers need to build reliable, scalable, and secure applications from concept to release.Starting Price: $45/user/month -
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Konfig
Konfig
Konfig is a developer tool that automates the generation of SDKs, documentation, demos, and tutorials for REST APIs, facilitating seamless onboarding for external developers. By importing an OpenAPI Specification or Postman Collection, Konfig automatically produces SDKs in popular programming languages, including TypeScript, Python, Java, C#, PHP, Ruby, Go, Swift, and Dart. The platform ensures high-quality SDKs by identifying and rectifying errors in the OpenAPI Specification through its linter and writing test cases to prevent API updates from breaking existing SDKs. Konfig also generates branded, user-friendly documentation that auto-updates with any changes to the API specification, maintaining consistency between documentation and SDKs. Additionally, it allows for the creation of engaging demos and tutorials using familiar Markdown, enabling users to run code in-browser for hands-on learning. -
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Early
EarlyAI
Early is an AI-driven tool designed to automate the generation and maintenance of unit tests, enhancing code quality and accelerating development processes. By integrating with Visual Studio Code (VSCode), Early enables developers to produce verified and validated unit tests directly from their codebase, covering a wide range of scenarios, including happy paths and edge cases. This approach not only increases code coverage but also helps identify potential issues early in the development cycle. Early supports TypeScript, JavaScript, and Python languages, and is compatible with testing frameworks such as Jest and Mocha. The tool offers a seamless experience by allowing users to quickly access and refine generated tests to meet specific requirements. By automating the testing process, Early aims to reduce the impact of bugs, prevent code regressions, and boost development velocity, ultimately leading to the release of higher-quality software products.Starting Price: $19 per month -
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Codename One
Codename One
Codename One is an open-source cross-platform mobile app development framework to build native iOS, Android, Desktop & Web apps with a single Java or Kotlin codebase. It compiles Java or Kotlin into native code for iOS, Android, UWP (Universal Windows Platform), and even JavaScript (with seamless PWA and Thread support). It's a complete mobile platform featuring virtual machines, simulator, design tools (visual theme/builder/css), IDE integrations, ports to multiple OS's and much more. It provides full access to the underlying native OS code (e.g. Objective-C, C#, Dalvik/ART) through a portable abstraction which enables 100% code reuse. -
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OpenClover
OpenClover
Balance your effort spent on writing applications and test code. Use the most sophisticated code coverage tool for Java and Groovy. OpenClover measures code coverage for Java and Groovy and collects over 20 code metrics. It not only shows you untested areas of your application but also combines coverage and metrics to find the riskiest code. The Test Optimization feature tracks which test cases are related to each class of your application code. Thanks to this OpenClover can run tests relevant to changes made in your application code, significantly reducing test execution time. Do testing getters and setters bring much value? Or machine-generated code? OpenClover outruns other tools in its flexibility to define the scope of coverage measurement. You can exclude packages, files, classes, methods, and even single statements. You can focus on testing important parts of your code. OpenClover not only records test results but also measures individual code coverage for every test.Starting Price: Free -
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RubyMine
JetBrains
Take advantage of the language specific-aware syntax & error highlighting, code formatting, code completion, and quick documentation. Use smart search to jump to any class, file or symbol, or even any IDE action or tool window. It only takes one click to switch to the declaration, super method, test, usages, implementation, and more. Enjoy super fast navigation in your Rails project with an MVC-based project view and model, class, and gem dependencies diagrams. Follow community best practices with code inspections verifying your code for many types of possible errors and providing on-the-fly improvements with quick-fix options. Automated yet safe refactorings help clean up your code and keep it more maintainable. Rails-aware refactorings help you perform project-wide changes: for example renaming a controller will also rename the helper, views, and tests.Starting Price: $199 per user per year -
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Jtest
Parasoft
Meet Agile development cycles while maintaining high-quality code. Use Jtest’s comprehensive set of Java testing tools to ensure defect-free coding through every stage of software development in the Java environment. Streamline Compliance With Security Standards. Ensure your Java code complies with industry security standards. Have compliance verification documentation automatically generated. Release Quality Software, Faster. Integrate Java testing tools to find defects faster and earlier. Save time and money by mitigating complicated and expensive problems down the line. Increase Your Return From Unit Testing. Achieve code coverage targets by creating a maintainable and optimized suite of JUnit tests. Get faster feedback from CI and within your IDE using smart test execution. Parasoft Jtest integrates tightly into your development ecosystem and CI/CD pipeline for real-time, intelligent feedback on your testing and compliance progress. -
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Jedi
Jedi
Jedi is a static analysis tool for Python that is typically used in IDEs/editors plugins. Jedi has a focus on autocompletion and goto functionality. Other features include refactoring, code search and finding references. Jedi has a simple API to work with. There is a reference implementation as a VIM-Plugin. Autocompletion in your REPL is also possible, IPython uses it natively and for the CPython REPL you can install it. Jedi is well tested and bugs should be rare. A Script is the base for completions, goto or whatever you want to do with Jedi. The counter part of this class is Interpreter, which works with actual dictionaries and can work with a REPL. This class should be used when a user edits code in an editor. Most methods have a line and a column parameter. Lines in Jedi are always 1-based and columns are always zero based. To avoid repetition they are not always documented. -
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DataMelt
jWork.ORG
DataMelt (or "DMelt") is an environment for numeric computation, data analysis, data mining, computational statistics, and data visualization. DataMelt can be used to plot functions and data in 2D and 3D, perform statistical tests, data mining, numeric computations, function minimization, linear algebra, solving systems of linear and differential equations. Linear, non-linear and symbolic regression are also available. Neural networks and various data-manipulation methods are integrated using Java API. Elements of symbolic computations using Octave/Matlab scripting are supported. DataMelt is a computational environment for Java platform. It can be used with different programming languages on different operating systems. Unlike other statistical programs, it is not limited to a single programming language. This software combines the world's most-popular enterprise language, Java, with the most popular scripting language used in data science, such as Jython (Python), Groovy, JRuby.Starting Price: $0 -
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Elm
Elm
Elm uses type inference to detect corner cases and give friendly hints. NoRedInk switched to Elm about four years ago, and 300k+ lines later, they still have not had to scramble to fix a confusing runtime exception in production. The compiler guides you safely through your changes, ensuring confidence even through the most widereaching refactorings in unfamiliar codebases. Including your own, six months later. All Elm programs are written in the same pattern, eliminating doubt and lengthy discussions when deciding how to build new projects and making it easy to navigate old or foreign codebases. Elm has its own virtual DOM implementation, designed for simplicity and speed. All values are immutable in Elm, and the benchmarks show that this helps us generate particularly fast JavaScript code.Starting Price: Free -
36
JetBrains Academy
JetBrains
Turn on the free educational features in your IDE to learn programming from scratch, expand your current skill set, or create your own interactive courses to share with others. With the JetBrains Academy plugin, you can learn and teach programming languages in the form of coding tasks and custom verification tests right inside JetBrains IDEs. Access over 100 courses in the most in-demand programming languages and technologies, and build real-world projects for your developer portfolio. Create your own courses by combining theoretical learning and hands-on practice. Test user knowledge with various sets of tasks, and provide extra assistance with feedback and hints. The JetBrains Academy plugin is free to use and supports Java, Kotlin, Python, Scala, JavaScript, Rust, C++, Go, and PHP with more languages to come. JetBrains Academy plugin is compatible with IntelliJ IDEA, PyCharm, WebStorm, Android Studio, CLion, GoLand, and PhpStorm.Starting Price: Free -
37
Transformer Cobol
Morphis Tech
Morphis Transformer for Cobol Automated Refactoring from Mainframe to Serverless When it comes to move workloads from mainframe to the cloud, we face two possible paths: Re-hosting: a more tactical approach that preserves the original code almost untouched. Refactoring: a more strategic alternative, in which new applications, written in more modern languages, are obtained from the legacy sources. At first glance Re-hosting can be more appealing, since it represents inferior cost and risks. But if Refactoring uses very high automation, both Re-host and Refactoring approaches can be pursued in projects with similar duration, similar risks, and similar costs. We here demonstrate the Morphis Automated Refactoring, yet tailored, approach to migrate from COBOL/CICS OLTP applications to single page applications, with JavaEE or .NET server logic, fully integrated with cloud native services. Furthermore, this approach also allows us to achieve the ultimate costs. -
38
Komodo Edit
ActiveState
Komodo Edit is a great editor if you’re looking for something powerful, yet simple. Komodo IDE provides more robust functionality such as debugging, unit testing, code refactoring and code profiling. Software vendors are increasingly the front line of security for their customers since one compromised patch or upgrade can make hundreds or even thousands of your customers susceptible to cyberattacks. Don’t be the next SolarWinds. Rather than implementing multiple point solutions and custom code, the ActiveState Platform can provide you with an out-of-the-box solution that helps ensure the security and integrity of the open source components you import, work with and run.Starting Price: $84 per month -
39
HtmlUnit
HtmlUnit
HtmlUnit is a "GUI-Less browser for Java programs" that models HTML documents and provides an API to interact with web pages, such as invoking pages, filling out forms, and clicking links, similar to a standard web browser. It offers fairly good JavaScript support, which is constantly improving and is capable of handling complex AJAX libraries, simulating browsers like Chrome, Firefox, or Edge depending on the configuration used. Typically used for testing purposes or retrieving information from websites, HtmlUnit is not a generic unit testing framework but is intended to simulate a browser within another testing framework such as JUnit or TestNG. It is utilized as the underlying "browser" by various open source tools like WebDriver, Arquillian Drone, and Serenity BDD, and is employed by many projects for automated web testing, including Apache Shiro, Apache Struts, and Quarkus.Starting Price: Free -
40
RustRover
JetBrains
Benefit from context-aware code completion and generation, on-the-fly analysis and quick fixes, smart refactorings, live templates, and more. Install rustup from the IDE, and apply compiler-suggested fixes in a single click. You can even forget about manually attaching newly created Rust files to main.rs or adding popular crates to the list of dependencies. Have every syntax element highlighted, including inferred types and macros, cfg blocks, and unsafe code usages. Unlock comprehensive type information and quick access to language and crate documentation, and navigate your codebase with RustRover’s powerful search functionality. Run individual tests, test modules, or all the tests inside a project and select various Run targets. You can also create custom Run configurations with full support for developing CLI applications. Quickly troubleshoot failing tests by jumping to the relevant code from the error message in the console.Starting Price: $129 per year -
41
CodeLite
CodeLite
CodeLite is a free, open-source, cross-platform Integrated Development Environment (IDE) designed primarily for C, C++, PHP, and JavaScript development. It offers a lightweight and highly customizable environment with support for multiple compilers, including GCC, Clang, and Microsoft Visual C++. CodeLite features an intuitive code editor with syntax highlighting, auto-completion, and code refactoring capabilities. It also includes an integrated debugger with support for GDB, making it easy to set breakpoints, inspect variables, and trace call stacks. Additionally, CodeLite supports Node.js and TypeScript development, making it a versatile choice for both desktop and web-based applications. Its flexibility, cross-platform compatibility (Windows, macOS, and Linux), and integration with popular version control systems like Git and Subversion make it a go-to IDE for developers seeking a lightweight alternative to more resource-intensive environments.Starting Price: Free -
42
GLM-4.5-Air
Z.ai
Z.ai is a free AI assistant that brings presentations, writing, and coding into one conversational interface. Leveraging large language models, it lets you generate polished slide decks with AI slides, craft professional‑grade text for emails, reports, or blogs, and write or debug complex code. Beyond content creation, Z.ai supports deep research and information search, helping you gather facts, summarize long documents, and overcome writer’s block, while its code agent can explain snippets, refactor functions, or build scripts from scratch. An intuitive chat interface means no steep learning curves: simply tell Z.ai what you need, a strategic deck, marketing copy, or a data‑analysis script, and get instant, contextually relevant results. With support for multiple languages (including Chinese), native function calling, and up to 128K token context length, Z.ai handles everything from brainstorming ideas to automating repetitive writing or coding.Starting Price: Free -
43
Casbin
Casbin
Casbin is an open-source authorization library that supports various access control models, including Access Control Lists (ACL), Role-Based Access Control (RBAC), and Attribute-Based Access Control (ABAC). It is implemented in multiple programming languages such as Golang, Java, C/C++, Node.js, JavaScript, PHP, Laravel, Python, .NET (C#), Delphi, Rust, Ruby, Swift (Objective-C), Lua (OpenResty), Dart (Flutter), and Elixir, providing a consistent API across different platforms. Casbin abstracts access control models into configuration files based on the PERM metamodel, allowing developers to switch or upgrade authorization mechanisms by simply modifying configurations. It offers flexible policy storage options, supporting various databases like MySQL, PostgreSQL, Oracle, MongoDB, Redis, and AWS S3. The library also features a role manager to handle RBAC role hierarchies and supports filtered policy management for efficient enforcement.Starting Price: Free -
44
SWE-Kit
Composio
SweKit let’s you build PR agents to review code, suggest improvements, enforce coding standards, identify potential issues, automate merge approvals, and provide feedback on best practices, streamlining the review process and enhancing code quality. Automate writing new features, debug complex issues, create and run tests, optimize code for performance, refactor for maintainability, and ensure best practices across the codebase, accelerating development and efficiency. Use highly optimized code analysis, advanced code indexing, and intelligent file navigation tools to explore and interact with large codebases effortlessly. Ask questions, trace dependencies, uncover logic flows, and gain instant insights, enabling seamless communication with complex code structures. Keep your documentation in sync with your code. Automatically update Mintlify documentation whenever changes are made to the codebase, ensuring that your docs stay accurate, up-to-date, and ready for your team and users.Starting Price: $49 per month -
45
Agentic StarShip
OpenCSG
Agentic StarShip is a comprehensive AI-powered platform developed by OpenCSG to enhance software development efficiency and code quality. It offers a suite of tools designed to automate and streamline various aspects of the development process. One of its key components is CodeSouler, an intelligent coding assistant that integrates seamlessly with popular IDEs like Visual Studio Code and JetBrains. Agentic StarShip provides features such as automatic code commenting, optimization, refactoring, and test case generation. It also facilitates real-time code explanations and Q&A, enabling developers to quickly understand and improve their codebase. The plugin supports right-click context menus and conversation boxes for easy interaction, and it offers operation commands for efficient code manipulation. Another vital feature is SecScan, an AI-driven security scanning tool that performs deep analysis of source code to identify potential vulnerabilities. -
46
Palmier
Palmier
Palmier lets you trigger AI agents from GitHub events to generate merge‑ready pull requests that fix bugs, write documentation, and review code without manual intervention. By connecting GitHub or Slack triggers, such as pull request opens, updates, merges, or issue labels, to prebuilt or custom agents, you can auto‑implement features, run security scans, refactor code, generate tests, and update changelogs in parallel, all within isolated sandboxes that never store your code or use it for model training. With drag‑and‑drop‑style integrations for GitHub, Slack, Supabase, Linear, Jira, Sentry, AWS, and more, Palmier delivers real‑time, ready‑to‑merge PRs with 45 percent lower review latency and unlimited parallel runs. Its MIT‑licensed agents operate in secure, ephemeral environments under your permission controls, ensuring full data privacy and compliance with your workflow.Starting Price: $30 per month -
47
Istanbul
Istanbul
JavaScript test coverage made simple. Istanbul instruments your ES5 and ES2015+ JavaScript code with line counters, so that you can track how well your unit-tests exercise your codebase. The nyc command-line-client for Istanbul works well with most JavaScript testing frameworks, tap, mocha, AVA, etc. First-class support of ES6/ES2015+ using babel-plugin-Istanbul. Support for the most popular JavaScript testing frameworks. Support for instrumenting subprocesses, using the nyc command-line interface. Adding coverage to your mocha tests could not be easier. Now, simply place the command nyc in front of your existing test command. nyc's instrument command can be used to instrument source files outside of the context of your unit tests. nyc is able to show you all Node processes that are spawned when running a test script under it. By default, nyc uses Istanbul's text reporter. However, you may specify an alternative reporter.Starting Price: Free -
48
Spock Framework
Spock
Spock is a testing and specification framework for Java and Groovy applications. What makes it stand out from the crowd is its beautiful and highly expressive specification language. Thanks to its JUnit runner, Spock is compatible with most IDEs, build tools, and continuous integration servers. Spock is inspired from JUnit, RSpec, jMock, Mockito, Groovy, Scala, Vulcans, and other fascinating life forms. Spock Web Console is a website that allows you to instantly view, edit, run, and even publish Spock specifications. It is the perfect place to toy around with Spock without making any commitments.Starting Price: Free -
49
Code Snippets AI
Code Snippets AI
Turn your questions into code. Easily store and fetch your snippets. Collaborate with your team. Powered by ChatGPT & our fine-tuned GPT3 model. Gain a deeper understanding of your code to further your knowledge. Increase the quality of your code with our refactor and debug features. Securely share code snippets with your team, without losing formatting. We use ChatGPT & our fine-tuned GPT3 Model, which provides faster and more accurate responses to your questions, compared to Codex apps. Create documentation, refactor, debug, and generate code with the click of a button. We use a fine-tuned AI model trained on GPT3, which provides faster and more accurate responses to your questions, compared to Codex apps. Save your code from your IDE straight into your library with our VSCode extension. Search snippets by language, name, or folder. Create your own folder structure to suit your needs. We use ChatGPT & our fine-tuned GPT3 Model, which provides faster and more accurate responses.Starting Price: $2 per month -
50
Roo Code
Roo Code
Roo Code, formerly known as Roo Cline, is an AI-powered autonomous coding agent integrated into Visual Studio Code, designed to enhance software development efficiency. It facilitates natural language interactions, enabling users to generate code, refactor existing code, debug, and update documentation seamlessly. It can read and write files directly within the workspace, execute terminal commands, and automate browser actions. It supports integration with any OpenAI-compatible or custom APIs/models and allows customization through various modes, including Code Mode for general coding tasks, Architect Mode for system design, Ask Mode for inquiries, Debug Mode for troubleshooting, and user-defined Custom Modes for specialized tasks. Roo Code also features the Model Context Protocol (MCP), extending its capabilities by integrating with external tools and APIs.Starting Price: Free