Copyright and license

This license, based on the maximally-permissive Apache 2.0 License, defines the terms under which we offer Simbody.

 * -------------------------------------------------------------------------- *
 *                                 Simbody(tm)                                *
 * -------------------------------------------------------------------------- *
 * This is part of the SimTK biosimulation toolkit originating from           *
 * Simbios, the NIH National Center for Physics-Based Simulation of           *
 * Biological Structures at Stanford, funded under the NIH Roadmap for        *
 * Medical Research, grant U54 GM072970. See https://simtk.org/home/simbody.  *
 *                                                                            *
 * Please cite:                                                               *
 *   Michael A. Sherman, Ajay Seth, Scott L. Delp, Simbody: multibody         *
 *   dynamics for biomedical research, Procedia IUTAM 2:241-261 (2011)        *
 *   http://dx.doi.org/10.1016/j.piutam.2011.04.023                          *
 *                                                                            *
 * Portions copyright (c) 2005-13 Stanford University and the Authors.        *
 * Authors: Michael Sherman, Peter Eastman                                    *
 * Contributors: Jack Middleton, Christopher Bruns, Paul Mitiguy, Matthew     *
 *   Millard, Charles Schwieters, Abhinandan Jain, Isaac Newton               *
 *                                                                            *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may    *
 * not use this file except in compliance with the License. You may obtain a  *
 * copy of the License at http://www.apache.org/licenses/LICENSE-2.0.         *
 *                                                                            *
 * Unless required by applicable law or agreed to in writing, software        *
 * distributed under the License is distributed on an "AS IS" BASIS,          *
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   *
 * See the License for the specific language governing permissions and        *
 * limitations under the License.                                             *
 * -------------------------------------------------------------------------- *

What's with that "TM" in Simbody™?

That symbol is to let you know that we claim a trademark on the name "Simbody" so you may not use that name except to refer to our software as we distribute it. The license permits you to make any kind of derivative work, or to use all or part of Simbody code in any way you like, but you can't call the resulting work "Simbody" without our agreement. We make that restriction because we don't want any confusion to exist about what is, and what is not, the Simbody project that we are supporting. But ... if you want to make improvements to Simbody we would love to have your well-engineered, open source contributions to put into the main Simbody source tree, in which case they would be included under the Simbody name.

How to acknowledge us

Our license does not require that you acknowledge us, but we and our sponsors would be grateful if you did anyway! If our hard work has helped you with yours, please throw us a bone and mention on your "About" page and in your documentation that you are using Simbody from https://simtk.org/home/simbody. Where appropriate, please cite this paper:

: Michael A. Sherman, Ajay Seth, Scott L. Delp, Simbody: multibody dynamics for biomedical research, Procedia IUTAM 2:241-261 (2011) http://dx.doi.org/10.1016/j.piutam.2011.04.023

We would be particularly grateful if you mention that Simbody is primarily funded by NIH Roadmap grant U54 GM072970. We appreciate that support very much, and the NIH appreciates knowing that its funds are having an impact, particularly on medical research and human health.