It is my pleasure to announce the release of the OpenSim software,
version 1.5.5. OpenSim is freely available to the biomechanics
community and enables modeling and simulation of human and animal
movement, including inverse dynamics analysis and forward dynamic
simulation. The new version allows general purpose inverse dynamics
and static optimization to estimate muscle forces. A complete User
Guide is also available. The software, models, and example
simulations are available at the project website: The project page also includes
tutorials to help you get started.

Best wishes - Scott Delp
(for the OpenSim Development Team)