Vvvv - vvvv is a graphical programming environment for easy prototyping and development.
Linux Show Player - Sound player designed for stage productions
Processing - C++ and Java programming at the speed of thought.
QLab - QLab, Live show control for Mac OS X.
TouchDesigner - TouchDesigner is a visual development platform that equips you with the tools you need to create stunning realtime projects and rich user experiences.
Trigger Audio and Video Playback - Audio and video cue player for broadcast and live performance.