Mekanimo aims to be the best tool for rapid (in minutes or hours) creation of computer games. It can also be used for scientific visualizations.
In its core there is a 2D rigid body physics solver based on Box2D (http://www.box2d.org). The application itself is created with Python (http://www.python.org) and wxPython (http://www.wxpython.org).
Mekanimo got a lot of help from third party applications and individuals as listed below.