Birdsong is a free print-and-play roll and write game about bird watching. Roll and writes are all the rage right now in tabletop gaming.
The Abstractionist is a free print-and-play board game for 2 – 6 players about artists creating color palettes for their abstract paintings. The core mechanism is tile laying.
Stew! is a print-and-play game about farmers collecting the ingredients for a winter stew.
Root Cellar is a free print-and-play board game about stocking up food for the winter.
Legends of Boxing is a free print-and-play sports game. It has lots of stats for historical boxers and a campaign mode.