Wikipedia
Algodoo
Algodoo is a physics-based 2D sandbox developed and sold by Algoryx Simulation AB, and is the successor to the popular physics application Phun. Algodoo was released on 1 September 2009 after significant delays in production . Algodoo is marketed as an educational tool and has much functionality with touch screen computers, computers with accelerometers, and the Intel Classmate PC. Algodoo's physics are based on the SPOOK linear constraint solver by Claude Lacoursière. In October 2011, Algoryx released two new programs: Algodoo for Education and Algodoo 2.0.0. In July 2016, released August 17 2016 Algodoo 2.2.0.