Sumopaint.com is a thriving online art community of over a 15 million unique users and over 300 000 registered members from over 220 countries. The primary purpose of the community is to create, share, remix, explore, comment, rate and fave the artwork of its members. Sumopaint.com hosts the internet's most versatile painting / photo manipulation application called the Sumo Paint.
Sumo Paint is a full featured photo editing / painting application, which works right in your favorite web browser! The application can be used in Windows, Macintosh or Linux operating systems. The only requirement is the Flash Player (which usually comes preinstalled in any OS).
This is nice for math. Also, pictures save as JPG.