A free C, C++ and Fortran IDE
Open-source, cross platform Qt based IDE for reverse-engineering
A powerful, lighweight and cross-platform C/C++ IDE
Cross-platform IDE for developing embedded solutions and desktops
Lightweight, cross-platform & full-featured shader IDE
CodeLite: an open source, cross platform C/C++/PHP and JavaScript IDE
Electronic design and programming tools suite like Eagle, MpLab
A code editor for the D programming language