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 is marketed as an educational tool and has much functionality with touch screen computers, computers with accelerometers, and the Intel Classmate PC.
Simulations in Algodoo involves using the given tools (polygon creation, cut, brush, box, circle, gear, plane, chain, spring, fixate, hinge, tracer and laser pen) and features (CSG, Velocity modification, attraction, refraction, killer/immortal objects, cutter objects, water and scripting) to create scenes with high levels of intricacy. The simple interface of Algodoo allows a new user to create simple things like cars or basic machines, while still not limiting those who want to make very complex machines, creatively achieving simulation objectives in a variety of ways.
Algodoo allows users to modify the gravitational force, restitution, friction, refractive index, density, layers of collision, controller acceleration, destruction and mirror keys, texture (allowing users to place a picture on an object) and color (and alpha channel) of a polygon, color and refractive index of water, fade distance, color and speed of light of a laser, color, speed, strength, impulse break limit, state, direction and controls of a hinge/motor, strength constant, damping factor and target length of a spring and fade time of a tracer, giving a lot of choices for users to change to get different results.
Sharing user created content among the Algodoo community is similar as it was in Phun with the usage of Algodoo's file sharing site, Algobox. There are currently over 30,000 unique creations stored.
source: Wikipedia
