Sites and apps similar to Multiuser Sketchpad include Our World of Pixels, which is free and open source. Other options are Drawsum.com - The open art project and malmal. In total there are three Digital Painting Tools like Multiuser Sketchpad for Android, iPhone and iPad.
Our World of Pixels is a web-based sandbox game in the purest sense: players are presented with a set of artistic tools and a giant communal canvas where anyone can draw and explore.
United States
The open art project is a place where you can draw anything onto one huge canvas (1200 megapixel), sharing your creativity, and be free!
On malmal you can draw and paint with your friends or with strangers from all over the world.
Germany
EU
