Gravity Free - Gravity Free – Light Particles Manipulation App developed and published by Kfirapps Limited.
Shadertoy - Build shaders, share them, and learn from the best community.
Particlescape - Particlescape app lets you create stunning patterns at your fingertips.
SHADERed - Lightweight, full-featured desktop tool for creating and testing HLSL and GLSL shaders
TripleA - TripleA is a free (under GPL) turn based strategy game based on Axis & Allies board game.
KodeLife - Real-time GPU shader editor, live-code performance tool and graphics prototyping sketchpad.