The KDevelop project was founded in 1998 to build up an easy to use IDE (Integrated Development Environment) for KDE. Since then, the KDevelop IDE is publicly available under the GPL and supports many programming languages.
Monkey Studio is a Free and cross platform IDE written in Qt 4.
The project has been started by AZEVEDO Filipe for his personal use around end of June 2005, and when he found it useful he open it
... [More] to the community. The project has been welled received and some guyz join it or send feedbacks/new features.
The current version is the v2 branch which succeed the v1 one and is dependent of Qt 4.4.0 minimum. It support Qt 4 projects management and embed Designer and Assistant to form a complete, fast and power full Qt 4 IDE. It's based upon a powerful and flexible plugin system that allow to extend it in an infinite way. [Less]
Ninemacs (aka 9-macs) is an experiment to create a complete Windows C/C++ IDE using just GNU software (gcc, mingw, msys, Emacs, etc.).
This experiment is to see how small can be packaged all GNU
... [More] software to get a normal IDE that can be used by anyone (also, the first time you'll run 9-macs you should get a little C++ program compiled in your machine).
Furthermore, very important work will be taken from ErgoEmacs project: http://code.google.com/p/ergoemacs/ [Less]