| Free Software Foundation and GNU Project | | Non-profit organization dedicated to eliminating restrictions on copying, redistributing, understanding, and modifying computer programs. GNU Project was begun to develop a complete free Unix-like operating system. |
| Open Source Initiative | | Dedicated to managing and promoting the Open Source trademark for the good of the community. Includes a definition of 'Open Source', and a list of approved licenses. |
| Open Source Resource Center | | Project of the Pakistan Software Export Board. Includes news, details of strategy, aims and services, discussion forums, and events listings. |
| Python Software Foundation | | Non-profit organization devoted to advancing open source technology related to the Python programming language. Provides membership information, missions statement, and details of how to get involved. |
| Software in the Public Interest, Inc. | | Aims to help organizations develop and distribute open hardware and software. Includes news, details of supported projects, and membership details. |
| The Apache Software Foundation | | Supports the development of a number of open-source software projects, including the apache webserver. Includes license information, latest news, and project sites. |
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