Phoenix is a modern open-source Code Editor for the web
A free C, C++ and Fortran IDE
Lightweight and easy to use cross-platform C++ IDE
an OSGi-based Swing Application Framework
Kile is a feature-rich LaTeX editor
LiteIDE is a simple, open source, cross-platform Go IDE.
CodeLite: an open source, cross platform C/C++/PHP and JavaScript IDE
Extensible HTML5 app for real-time collaborative projects
The professional, open source development tool for the open web
Electronic design and programming tools suite like Eagle, MpLab
A free, portable, fast and simple C/C++ IDE
A tiny and lightweight IDE for the Go programming language
Graph algorithms interpreter, IDE, debugger, 3D visualizations.
IDE for PIC microcontrollers
A modernized, platform independant version of Dev-C++