Hello nsceusa! I made a print-and-play cooperative board game: The Polymorph Prank at Piglumps Prep, for 1 to 4 players. I'm quite proud of it, but be warned: if you want to play it, you'll need to cut out 90 cards.
Thank you for starting this thread. If I have time, I'd like to compile a list of links to print-and-play projects I come across while exploring.
Edit: Forgot that I should include a link to my game. https://itch.io/jam/extra-credits-game-jam-6/rate/739409