An anonymous reader writes "On this day, 25 years ago, Richard Stallman created the Free Software Foundation. He had been the director of the Massachusetts Institute of Technology Artificial Intelligence Lab. Tired of seeing software that he and others had written appropriated (without acknowledgment or compensation) by disreputable software companies and then told to pay for software they had written, Stallman took action, creating the foundation. The original license was written by Stallman. Stallman had subsequently written a large number of GNU tools, but the license was his most important contribution."