This might interest someone on this board. Haiku OS is looking for an university student to create an OpenGL stack for Haiku. It comes with not less than an 5000 usd bounty.
Hardware 3D acceleration
Design or port an existing 3D driver interface. See for example the Gallium3D project. Another option is to write a compatibility layer to load binary Linux 3D graphics drivers. There should probably still be our own 3D acceleration API for drivers.