OpenGL Extensions Viewer displays the vendor name, the version implemented, the renderer name and the extensions of the current OpenGL 3D accelerator.

If you have an Internet connection, you can retrieve from SGI the extension's specifications that explain the available extensions.

OpenGL Extension Viewer (GLView) has been suggested by OpenGL.org and nVidia for OpenGL developers. Available for English, French, Czech, Ukranian, Dutch, German, Japanese.