I just thought I'd drop by to announce the release of my latest project, an open source FPGA sprite graphics accelerator (http://andybrown.me.uk/wk/2014/06/01/ase). It's definitely my most ambitious project yet and I hope that you find it interesting. It took me several months of evening and weekend hacking to complete this one but it was definitely worth the effort.
There's a video to go with it and of course all the source code, this time including C++ and VHDL, is available on github (https://github.com/andysworkshop/ase").
This project made me really interesting in the whole idea of using FPGA as GPU. I have actually ordered PCB for it, with a hope that I can have some fun with it :)