Here's my jam: Nondeterministic November 2 - itch.io
This is my second attempt at creating a jam to get people interested in NP-complete problems. The idea here is that maybe a lot of people working on NP-complete problems might learn something new that the big dogs in the world of computer science haven't discovered yet.
My own interest in this is that I might be able to make a toolbox of algorithms that I can use in my own programs. Other people might have different objectives.
NP-complete problems include: boolean satisfiability, subset sum, sudoku, clique finding, graph coloring, and many more.