Although I no longer run the operating system Ubuntu, my experiences with it has been phenomenal. This is a very good example of people coming together to help improve and share an operating system for everybody. Not only is it open access, it is also easy to adapt no matter what your skills are with a computer. Anybody can create free apps for the system to help improve it and adapt it to individual needs. http://www.ubuntu.com

http://osmso.org

This is a group of students that has come up with the idea of improving the medical field by creating several open access programs to help facilitate learning across the medical community!