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Browse free open source C CGI Scripts and projects below. Use the toggles on the left to filter open source C CGI Scripts by OS, license, language, programming language, and project status.

  • Pylon is an All-in-one B2B Support Platform for modern B2B businesses. Icon
    Pylon is an All-in-one B2B Support Platform for modern B2B businesses.

    Pylon is a modern support system that integrates with all B2B channels like Slack and Team.

    We bring together everything a post-sales teams team needs including a ticketing system, B2B omnichannel integrations (Slack Connect, Microsoft Teams), modern chat widget, knowledge base, AI support bot, account management, customer marketing, and more.
    Learn More
  • Powerful Business Process Automation Icon
    Powerful Business Process Automation

    With ThinkAutomation, you get an open-ended studio to build any and every automated workflow you could ever need.

    When a message is received ThinkAutomation automatically executes one or more Automations. Automations are created using an easy to use drag-and-drop interface to run simple or complex tasks. Automations can perform many business process Actions, including: updating company databases, CRM systems and cloud services, sending outgoing emails, Teams & SMS messages, document processing, custom scripting, integration and much more. Over 100 built-in actions are included, plus ThinkAutomation is extensible with Custom Actions.  
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  • 1
    A tiny (<30K) cgi wrapper that uses a UNIX shell or a Lua VM to provide PHP-like scripting for dynamic web content. It transparently parses form data, including mime-formatted file uploads.
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    Downloads: 4,829 This Week
    Last Update:
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  • 2
    ooRexx (Open Object Rexx)
    Home of the Open Object Rexx Project. ooRexx is the open source version of IBM's Object REXX Interpreter. It is upwardly compatible with classic REXX and will execute classic REXX programs unchanged. The project is managed by the Rexx Language Association.
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    Downloads: 215 This Week
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  • 3
    Allows editing of any size file in hexadecimal, decimal and ASCII. A great tool that allows you to edit and analyze the contents for either the data or resource fork of any type of file. 68K, PPC and Carbon run on MacOS 7-9 and X.
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    Downloads: 142 This Week
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  • 4
    LibCGI is a simple to use and powerful library written from scratch to assist in the making of CGI appliactions in C. It has support for string manipulation, linked lists, cookies, sessions, GET and POST methods, and more stuff.
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    Downloads: 118 This Week
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  • Eurekos LMS - Build a Smarter Customer Icon
    Eurekos LMS - Build a Smarter Customer

    The Eurekos customer training LMS makes it easy to deliver product training that retains more customers and transforms partners into advocates.

    Eurekos is a purpose-built LMS that engages customers throughout the entire learning journey from pre-sales, to onboarding, and everything after.
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  • 5
    Decodes CGI data from standard input, $QUERY_STRING , and $HTTP_COOKIE. Stores data in lookup table(s) for easy retrieval. Uploads files by copying directly to files created with mkstemp(). Has several handy string conversion functions.
    Downloads: 18 This Week
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  • 6
    Fast Artificial Neural Network Library is a free open source neural network library, which implements multilayer artificial neural networks in C with support for both fully connected and sparsely connected networks. Cross-platform execution in both fixed and floating point are supported. It includes a framework for easy handling of training data sets. It is easy to use, versatile, well documented, and fast. Bindings to more than 15 programming languages are available. An easy to read introduction article and a reference manual accompanies the library with examples and recommendations on how to use the library. Several graphical user interfaces are also available for the library.
    Downloads: 15 This Week
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    See Project
  • 7
    Ming is an SWF ("Flash") file format output library. It is written in C, with wrappers for C++, Python, and PHP, plus rudimentary support for Ruby and Perl.
    Downloads: 11 This Week
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  • 8
    Cinemagoer

    Cinemagoer

    Python package to retrieve and manage data of the IMDb

    Cinemagoer is a Python package useful to retrieve and manage the data of the IMDb movie database about movies, people, characters and companies. Platform-independent, it can retrieve data from both the IMDb's web server and a local copy of the whole db.
    Downloads: 10 This Week
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  • 9
    Haru is a free, cross platform, open-sourced software library for generating PDF written in ANSI-C. It can work as both a static-library (.a, .lib) and a shared-library (.so, .dll).
    Downloads: 20 This Week
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  • Safetica Data Loss Prevention Software for Businesses Icon
    Safetica Data Loss Prevention Software for Businesses

    For companies that want to protect their sensitive data against leakages, insider threats and want to be compliant with regulations.

    Safetica is a cost-effective, easy-to-use Data Loss Prevention (DLP) solution. It performs security audits, prevents sensitive data from leaving your company, and sheds light on what is going on in your organization.
    Learn More
  • 10
    A general purpose implementation of the xmlrpc specification in C.
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    Downloads: 9 This Week
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  • 11
    Parse formatted man pages and man page source from most flavors of UNIX. Convert to HTML, ASCII, TkMan, DocBook, and other formats.
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    Downloads: 16 This Week
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  • 12
    UnixODBC.pm provides a Perl API for the unixODBC driver manager and a bridge API for unixODBC network queries. The sample text-mode, GUI, and Web clients can manage multiple hosts and DBMSs and create RSS output.
    Downloads: 2 This Week
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  • 13
    JPEG thumbnail generator. Makes small images from your big ones. Should work on just about any *nix with libjpeg.
    Downloads: 6 This Week
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  • 14
    Porcupine is an open-source Python based web application server that provides front-end and back-end revolutionary technologies for building modern data-centric Web 2.0 applications.
    Downloads: 4 This Week
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  • 15
    *NOTE* Project moved to github.com/cgiwrap/cgiwrap More secure user access to cgi scripting. Runs scripts as the user who owns them. Initial inspiration for suexec. CGIwrap however is server independent.
    Downloads: 2 This Week
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  • 16
    A C and C++ Library + a compiler to create Adobe Flash SWF movies up to version 9 (v1.8.1). Supports nearly all the tags, includes an ActionScript compiler. Detailed docs and other tools: convert fonts to Flash, decompile Flash, jpg2swf. LASTEST IS 1.8.4
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    Downloads: 3 This Week
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  • 17
    rejoin your friends on lan and internet games with one click or join lan games from the internet. see server and player info
    Downloads: 3 This Week
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  • 18
    retawq is a multi-threaded web browser for text terminals on Unix-like computers. It is fast, small, nicely configurable and comfortable; e.g. you can keep open as many "virtual windows" as you want and work simultaneously in two of them.
    Downloads: 3 This Week
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  • 19
    HTML template library written in C inspired by perl HTML::Template. Template language has HTML-like tags (tmpl_var, tmpl_if, tmpl_loop, etc.) Use library to build a variable list and pass it to a template.
    Downloads: 1 This Week
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  • 20

    DACS - Distributed Access Control System

    Authentication, Access Control, and Single Sign-On

    DACS,a light-weight single sign-on and role-based security system for Apache or server-based software, provides comprehensive authentication capabilities, and powerful, transparent rule-based authorization checking for any web service or CGI program. The latest release is DACS 1.5.1 (26-Oct-2025) It is not available here! Get it at https://dacs.dss.ca/download.html
    Downloads: 2 This Week
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  • 21
    HTML Code Convert helps speed up the conversion of HTML code into different format including Java Script, JavaServer Pages, Microsoft ASP, PHP, Perl, and the UNIX Shell. It is particularly useful in CGI scripting.
    Downloads: 2 This Week
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  • 22
    gdcsim is a modular logic circuit simulator that can run unattended. It detects faults such as glitches and race conditions.
    Downloads: 1 This Week
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  • 23
    Command-line tool for manipulation with PPM images. It can create a single image from multiple images by mixing them on top of each other. It can also zoom and crop image, or perform all of these operations simultaineously.
    Downloads: 1 This Week
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  • 24
    Mod_Rexx is an Apache loadable module which interfaces to Rexx. All phases of an Apache request can be processed with Mod_Rexx. It supports Open Object Rexx and Regina Rexx.
    Downloads: 1 This Week
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  • 25
    YATS is a PHP C extension that implements a custom templating language, similar to FastTemplate, for clean separation of code/logic from display/html. Coded with emphasis on simplicity and execution speed. Supports GNU Gettext for multi-lingual sites.
    Downloads: 1 This Week
    Last Update:
    See Project