Mesa 9.0 develops OpenGL 3.1 support
Mesa 9.0 is the latest development version of the open source implementation of OpenGL's specification for rendering interactive 3D graphics. The new release sets out to implement version 3.1 of the OpenGL API for selected hardware; the developers do note that the software reported version will vary dependant upon what is supported by the hardware and drivers.
New Gallium 3D drivers for nv30 (Noveau open source driver for older NVIDIA hardware) and radeonsi (an open source driver for Radeon's HD7750 - HD7970 cards) have been added. The new OpenCL state tracker called Clover is also being added along with the completed version of the VDPAU state tracker, though that can only video decode MPEG1 and MPEG2 currently. Basic support for Intel's forthcoming Haswell range of processors has also been incorporated into Mesa 9.0.
Further details of the changes are included in the release notes which also point out that "People who are concerned with stability and reliability should stick with a previous release" such as July's 8.04 bugfix release or wait for the release of Mesa 9.0.1. Mesa is published under the MIT licence.