aka open source
examples of projects include GNU Linux Mozilla Apache FreeNet
advocates include RMS Eric S. Raymond Loic Dachary
Complete system sources will be available to everyone. As a result, a user who needs changes in the system will always be free to make them himself, or hire any available programmer or company to make them for him. Users will no longer be at the mercy of one programmer or company which owns the sources and is in sole position to make changes.