Phoronix: APITrace Continues Bettering OpenGL Debugging

APITrace has been around for a few years and has evolved into the best open-source application for OpenGL debugging and tracing/replaying of OpenGL events. APITrace also supports OpenGL ES and Direct3D/DirectDraw while new features continue to be added...

http://www.phoronix.com/vr.php?view=MTQ4NDQ