gDEBugger, an OpenGL debugger and profiler, traces application activity on top of the OpenGL API, letting programmers see what is happening within the graphics system implementation to find bugs and optimize application performance. The new V2.2 introduces a shader “Edit and Continue” ability which allows you to edit, save and compile shader source code, link and validate programs “on the fly”. This feature saves developer time required for rebuilding and re-running the debugged application. This version also adds support for 8 additional OpenGL extensions. (http://www.gremedy.com)