Open Source Java Load Testing Tools

The Apache JMeter™ application is open-source software, a 100% pure Java application designed to load test functional behavior and measure performance. It was originally designed for testing Web Applications but has since expanded to other test functions. Apache JMeter may be used to test performance both on static and dynamic resources, Web dynamic applications. It can be used to simulate a heavy load on a server, group of servers, network or object to test its strength or to analyze overall performance under different load types.

The SoapUI download has moved to https://www.soapui.org/downloads/soapui/source-forge.html With more than 9 million downloads SoapUI is the de-facto standard for REST and SOAP API functional, security and performance testing.

VNC for use with the BrowserMob Selenium JavaScript Validator. This tool is made available for users of BrowserMob FREE Website Monitoring and Load Testing. The BrowserMob Local Validation Service can be downloaded from https://browsermob.com/tools.

JCrawler is a perfect cralwing/load-testing tool which is cookie-enabled and follows human crawling pattern (hit/second).

This is a HTTP traffic generator for load testing web applications. It is very simple and fast and can simulate client activity on multiple servers at the same time. Supports almost all http methods such as GET, POST, HEAD

Hitman is java based load testing tool for wesites. It gives valuable information about the response time when the number of hits increase.

JMeter is a load testing framework developed in Java. This plugin adds functionality to JMeter that logs results to a database, allowing for more effective reporting.

A modular and distributable performance harness for load testing application servers. Developed in java and designed in the same spirit as JUnit (www.junit.org).

LogiTest is a suite of applications to aid in the testing of web sites and web based applications. Applications in the suite include: LogiTest for functional and regression testing, LogiMonitor for real-time monitoring, and LogiLoad for load testing.

E-Mail monitoring, benchmarking and load testing tool with integrated web UI.

SoaBox lets you create a virtual version of your SOA environment. Clients (WS-Webservices,RESTful, JMS, HTTP, FTP, Filesystem, POJOs/Custom Code), servers (HTTP/Endpoints) and data (XML, SOAP, CSV, etc). It's written in Java and runs with JBoss 5.x and 6.x

Web application load testing tool written in Java. Uses a central console to manage remote simulations allowing for a large number of virtual users. Can test fullblown web applications requiring cookies and complex querystring and formdata.

A community-developed, free, open source, microservices API automation and load testing framework built using JUnit core runners for Http REST, SOAP, Security, Database, Kafka and much more. Zerocode Open Source enables you to create, change, orchestrate and maintain your automated test cases declaratively with absolute ease. Zerocode makes it easy to create and maintain automated tests with absolute minimum overhead for REST,SOAP, Kafka Real Time Data Streams and much more. It has the best of best ideas and practices from the community to keep it super simple, and the adoption is rapidly growing among the developer/tester community. Zerocode is a modern lightweight, simple and extensible open-source framework for writing test intentions in simple JSON or YAML format that facilitates both declarative configuration and automation. Put simply, Zerocode alleviates pain and brings simplicity to modern API automation.

jLlama is a desktop application to monitor servers over SSH. Any figure retrieved from the command line can be polled and graphed in real time. Out of the box, jLlama can graph CPU and Memory usage for Linux and Solaris servers.

The jload framework enables developers to create repeatable load test cases. The framework will then execute these cases and generate reports and graphs showing the execution times and characteristics.

A Java Web crawler: multi-threaded, scalable, with high performance, extensible and polite. It can be used to crawl and index any web or enterprise domain and is configurable through a XML configuration file.