A challenging but interesting project:
Complete Verilog implementation of a 2D/ 3D graphics processor capable of OpenGL and D3D w/ full test suite
Help fund us to create the the first professional quality Open Source GPU and help Kickstart an Open Hardware revolution. The current aim is to finish the final few modes of operation and release our product as a complete, professional, open source hardware platform. We will provide a complete Verilog implementation of a 2D/3D graphics processor capable of OpenGL and D3D with a full test suite that anyone is free to use and improve upon. Our Ultimate stretch goal is to create a complete open source implementation of a modern day graphics accelerator.
Open Source Graphics Processor (GPU) by Francis Bruno — Kickstarter.