Apache NetBeans
Phoenix is a modern open-source Code Editor for the web
A free C, C++ and Fortran IDE
Rapid applications development tool and libraries for FPC
Open Source C & C++ IDE for Windows
Launch an external diff tool like WinMerge in Eclipse
Eclipse plugin for VCS ClearCase
A modern, lightweight yet powerful text editor
Open-source plugins included in the distribution of IntelliJ IDEA
Extensible HTML5 app for real-time collaborative projects
Electronic design and programming tools suite like Eagle, MpLab
a Human and Artificial Intelligence Network
A free, portable, fast and simple C/C++ IDE
Tools to support the learning of the C programming language