Yukon is a set of libraries and applications that are designed to capture realtime videos of OpenGL applications (games). The original design idea is based on Anandtech's FrameGetter, but was extended to suit todays high-performance computers.
Taksi is a utility that allows you to take screenshots and record video clips of your favourite games and other 3D-graphics applications. Inspired by Fraps (www.fraps.com), Taksi aims to provide an open source alternative to that great tool.
Taksi can support live video compression with any VFW video codec your system has installed (i.e. XVid, DivX, MS Mpeg4, etc).
The OpenGL Extension Wrangler Library (GLEW) is a cross-platform open-source C/C++ extension loading library. GLEW provides efficient run-time mechanisms for determining which OpenGL extensions are supported on the target platform. OpenGL core and extension functionality is exposed in a single header file. GLEW has been tested on a variety of operating systems, including Windows, Linux, Mac OS X, FreeBSD, Irix, and Solaris.
OGLE (i.e. OpenGLExtractor) is an open source software package by the Eyebeam OpenLab that allows for the capture and re-use of 3D geometry data from 3D graphics applications running on Microsoft Windows. It works by observing the data flowing between 3D applications and the system's OpenGL library, and recording that data in a standard 3D file format. In other words, a 'screen grab' or 'view source' operation for 3D data.