Free arb software for linux

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.(SGI). However, the author does not possess an OpenGL license from SGI, and makes no claim that Mesa is in any way a compatible replacement for OpenGL or associated with SGI. Those who want a licensed implementation of OpenGL should contact a licensed vendor.
Please do not refer to the library as MesaGL (for legal reasons). Its just Mesa or The Mesa 3-D graphics libraryand thats all.
Enhancements:
New features
- OpenGL 2.0 and 2.1 API support.
Bug fixes
- Fixed a few fog-related bugs.
- Fixed broken GLSL mix() function.
- Fixed broken GLSL exp() functions.
- Fixed GLSL mod4(vec4, vec4) bug.
- Implemented GLSL asin(), acos(), atan() functions.
- Fixed an R300 driver bug that caused Xorg composite manager to crash
- Fixed R300 vertex program/matrix bug (10848)
- GLSL dFdx() and dFdy() work for fragment program inputs now (texcoords)
- Specifying an invalid texture unit as a sampler could lead to a crash
- The GLX protocol request for glXDestroyPBuffer() was incorrect (bug 10983)
- ARB vp state.light[n].half value was incorrect (bug 10987)
- Fixed a positional light source bug (bug 11009)
- Fixed point size attenuation problem (bug 11042)
- glPopAttrib didnt restore texture objects LOD bias (bug 11049)
- Fixed a TLS / TEXTREL problem (bug 7459)
Internal code changes
- Some texture code consolidation and simplifiction (Ian Romanick)
- R300 driver clean-ups.
Driver Status
- Driver Status
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- DRI drivers varies with the driver
- XMesa/GLX (on Xlib) implements OpenGL 2.1
- OSMesa (off-screen) implements OpenGL 2.1
- Windows/Win32 implements OpenGL 2.1
- Glide (3dfx Voodoo1/2) implements OpenGL 1.3
- SVGA unsupported
- Wind River UGL unsupported
- DJGPP unsupported
- GGI unsupported
- BeOS unsupported
- Allegro unsupported
- D3D unsupported