Web Starter Kit - a workflow for multi-device websites
SCons tool to cooperate with gnuplot program
A web-friendly way for anyone to build unusual displays
Cocos2d for iOS and OS X, built using Objective-C
ElRey for create an .app package from python
Build a Jekyll blog in minutes, without touching the command line
The dotCODES Source Control Maintenance Mainframe (SCM2)
General purpose build system
AMPPS is a LAMP/MAMP/WAMP stack
Realtime preview for designers and developers.
A Linux live DVD with tools for develop web sites
Web development IDE in browser, supports Java, ruby, javascript...etc
Auto generate VS, Codewarrior, Codeblocks, XCode projects