I'm hosting the Cat Jam for Charity. The jam is open for all project types, existing and new. We're turning this into a bundle to raise funds for a local (to me) cat rescue.

https://itch.io/jam/charity-cat-jam

Something I'm very happy with on this jam is the "Badges" system. There are badge images on the page for different achievement-like goals that participants can add to their pages. They double as personal challenges for participants to shoot for and an easy DIY shorthand to let purchasers know what they're getting. Also they're very cute. For example: