I started on my own blog (drawgabbydraw) by posting a blob for people to draw on, and it got such a great response that I decided to create Gab Collab to keep the fun going.
The only other similar project I can think of is Lee Crutchley’s The Art of Getting Started. He posts “assignments” that you complete and submit. The scope is more varied than Gab Collab; definitely check it out.
Anyone know of any other collaborative projects like this?