OpenSim is supported by the National Center for Simulation in Rehabilitation Research (NCSRR) is a National Center for Medical Rehabilitation Research funded by NIH research infrastructure grant P2C HD065690. OpenSim is also supported by Simbios, the NIH National Center for Physics-Based Simulation of Biological Structures at Stanford, grant U54 GM072970, and by DARPA through the Warrior Web Program. 

See the Authors page for a list of the many people who have contributed to the OpenSim project over the years.

OpenSim relies on a wide variety of third-party software (licenses are in parentheses):

The source code for LGPL components can be obtained from the links above.

The following software tools are used when building (compiling) OpenSim: