libgl1-mesa-dev 6.4.1-0ubuntu3 (i386 binary) in ubuntu dapper

A free implementation of the OpenGL API -- GLX development support files
 This version of Mesa provides GLX and DRI capabilities: it is capable of
 both direct and indirect rendering. For direct rendering, it can use DRI
 modules from the libgl1-mesa-dri package to accelerate drawing.
 .
 This package includes headers and static libraries for compiling
 programs with Mesa.
 .
 For a complete description of Mesa, please look at the libgl1-mesa
 package.