You are welcome to use, modify, and redistribute OSF software free of charge, provided you do so according to the terms of the appropriate License.

If you are not a developer planning to build your own executable version of the OSF software, then we recommend the the Open Source binary releases. OSF Open Source binaries are licensed under the terms of the OSF End-user License Agreement (EULA).

OSF software source code is licensed under the terms of the Open Public License (OPL). OPL requires that any modifications to the OSF source code files that you redistribute outside of your organization be published for all in source code form. OPL also requires the preservation of all copyright and attribution notices within modified versions of the any OSF software.

We welcome all users to join the OSF Community, and invite you to share contributions of testing & bug-fixes, enhancements, or other modifications with OSF for consideration and inclusion in the software. A good first step is to join the Foundation's  Openforum and learn more about becoming a Contributor.

For more information about licenses please review the License FAQs.

3rd Party Licenses

OSF software may bundle best-of-breed open source technologies (such as Apache, MySQL, Java, etc); they are licensed to you when you use the binary releases under the same terms that they are normally shared with the world:
All OSF Third Party Licenses