libgl1-mesa 6.3.2-0ubuntu6 (amd64 binary) in ubuntu breezy

A free implementation of the OpenGL API -- runtime
 Mesa is a 3-D graphics library with an API which is very similar to
 that of OpenGL. To the extent that Mesa utilizes the OpenGL command
 syntax or state machine, it is being used with authorization from
 Silicon Graphics, Inc. However, the author makes no claim that Mesa
 is in any way a compatible replacement for OpenGL or associated with
 Silicon Graphics, Inc.
 .
 On Linux, this library is also known as libGL or libGL.so.1.