Live Coder is the kind of tool I like: it’s a real desktop app that allows GLSL live coding. Browser-based live programming tools are cool (GLSL Sandbox / Shader Toy) but I still prefer desktop apps for live coding…
Live Coder is an open source project (you can grab the full source code HERE) and is available for Windows and MacOSX (and for Linux too even if not specified in the readme). You can download the Win32 executable HERE.
Hangs on my computer with Intel onboard graphics, but messages in console show reason – OpenAL do not recognizes Realtek sound chip…
Praxis LIVE also allows desktop live coding GLSL – http://code.google.com/p/praxis/
Video in action (3rd one) – https://praxisintermedia.wordpress.com/2012/07/30/video-rough-cuts-1/