We regularly publish game jam games, and sometimes bigger collaborative projects.
We're hosting the Random WikiHow Jam, a game making challenge about turning a random WikiHow article into a silly, broken or perhaps beautiful little game in the course of 48 hours.
Random WikiHow Jam :
https://itch.io/jam/random-wikihow-jam
https://itch.io/jam/random-wikihow-jam-2
https://itch.io/jam/random-wikihow-jam-3