Conway's Game of Life
Following the passing of John Horton Conway, I made an NES implementation of Conway's Game of Life. This implementation has a 40x40 grid (non-wrapping) and runs pretty slowly, but does work.
I wrote a blog post titled "Implementing Conway's Game of Life on the NES" that goes into more details about this project.
Implementing Conway's Game of Life on the NESDownload the NES ROM
NES ROM FileSource Code