Bluefish is a powerful editor for experienced web designers and programmers. Bluefish supports many programming and markup languages, but it focuses on editing dynamic and interactive websites.
Rapid applications development tool and libraries for FPC
The Lazarus IDE is a stable and feature rich visual programming environment for the FreePascal Compiler. It supports the creation of self-standing graphical and console applications and runs on Linux, FreeBSD, MacOSX and Windows.
A powerful editor and graphical debugger for code written in Scilab
Scipad is a powerful editor and graphical debugger for programs written in the Scilab language. It is a mature and highly configurable editor, almost entirely written in Tcl/Tk. Scipad is a free software running on Linux and Windows. Licence is GPL V2.
Development of the project has been suspended
Keypad+ - is a text editor with syntax support for various programming languages. Written in PHP, for the operating system Windows.
A syntax highlighting, code folding text component written in Swing
RSyntaxTextArea is a syntax highlighting, code folding text component written in Swing. NOTE: For quite awhile now, RSTA's source has been hosted on GitHub, but releases were mirrored here on SourceForge. As of late 2015, all release artifacts are also hosted solely on GitHub. This SourceForge site is simply here to forward folks to our GitHub home: http://github.com/bobbylight/RSyntaxTextArea Artifacts are also available in Maven, e.g. com.fifesoft:rsyntaxtextarea:2.x.x
A free, portable, fast and simple C/C++ IDE
A new and improved fork of Bloodshed Dev-C++
Geany is a small and lightweight integrated development environment. Basic features are syntax highlighting, code completion, code folding, call tips, many supported filetypes.
A free IDE for C#, VB.NET, & Boo projects on Microsoft's .NET platform
SharpDevelop is the open-source IDE for the .NET platform. Write applications in languages including C#, VB.NET, F#, IronPython and IronRuby, as well as target rich and reach: Windows Forms or WPF, as well as ASP.NET MVC and WCF. It starts from USB drives, supports read-only projects, comes with integrated unit and performance testing tools, Git, NuGet and a lot more features that make you productive as a developer.
Pure Java IDE for brainfuck, which follows the principle of KISS.
ASED is a Tcl/Tk Editor written in pure Tcl/Tk using the BWidget Toolkit. Features included: multifile editing, syntax-highlighting, command-expansion, undo/redo, autoindent, find/replace, file-browser, help-system
AmIDE - Amiga Integrated Development Environment is a modern MUI based IDE system that should make the Amiga developer able to use his favourite Compiler system with a modern looking GUI System with features like filetype handling, Build/Make, TextEd
PLCEdit is a cross-platform editor for POU files (program organisation unit). Supported POU sources are PROGRAM, FUNCTION_BLOCK, FUNCTION and GLOBAL_VARIABEL_LIST files, according to the IEC61131-3 standard.
Dev-PHP is a well-featured IDE for PHP. Fast and powerful, it is easy to use and has a lot of cool features : class browser, scripts preview, integration with PHP parsers, PHP-GTK library, and Xdebug of course. Dev-PHP-usb slips even into your pocket.
A RAD GUI Building IDE for wxPython.
An open source IDE for AROS Research Operating System
Edyuk is a free, open source, fast and lightweight development environment which supports C++ and Qt 4 out of the box and can be extended through plugins. It works under all platforms supported by Qt 4 (Linux, Mac, Windows, BSD, ...).
Monkey Studio is a cross platform IDE wich primary goal is to support all kind of Qt relating programming. This place is now a mirror, the new official downloads place is http://code.google.com/p/monkeystudio/
Test&Go Developer is a graphical IDE dedicated to the validation and processing of databases and files (XML, XLS, etc.). It creates platform independent scripts which you can configure through python events. It provides a complete plugin interface.
PovClipse is an eclipse editor plugin for Povray (Persistence of Vision Raytracer) scene- and include files. It features syntax highlighting, code folding, code assist, outline view as well as running Povray or MegaPOV using render configurations.