My 6502 emulator written in Haskell has been up on GitHub for a while, thought I post the link here:
https://github.com/blitzcode/neskell
I'm currently in the middle of another project, but I left it with the CPU part in decent shape. Had a lot of fun with it, and would like to return later to work on the PPU/APU. For now, it's probably only interesting if you're looking into writing a Haskell emulator yourself (the development & architecture notes on the GItHub page might be worth a read).
In any case, hope it's interesting to somebody, thanks for all the help & great wiki / forum / test suite resources by the community here!
