A free, portable, fast and simple C/C++ IDE
A new and improved fork of Bloodshed Dev-C++
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.
Geany is a small and lightweight integrated development environment. Basic features are syntax highlighting, code completion, code folding, call tips, many supported filetypes.