Opengl-3 programming on old laptop hardware

I'm interested in doing some initial development targeting OpenGL 3. Unfortunately, my hardware is ~6 years out of date, a开发者_开发百科nd it doesn't look like ATI provides any drivers for my video card which support the newer OpenGL API's.

Are there any software implementations of the OpenGL 3 API's? I'm aware the performance will likely be dreadfully slow, but it'd be enough to hold me over until I can purchase a new laptop :)

Mesa 3D is probably your best bet.