Mesa is an
OpenGL work-alike (similar to the relationship between
LessTif and
Motif). Mesa runs on a number of platforms, namely:
Amiga,
Apple Macintosh,
NeXT,
OS/2,
MS-DOS,
VMS, and
Win32. Mesa can provide (in addition to its
software renderers) basic hardware accelerated 3D support (e.g.,
3Dfx Voodoo/
VoodooRush/
Voodoo2).
It is
open source, licensed under the
GPL.