The Free Software Foundation (FSF) welcomed the public commitment from Sun Microsystems to distribute its proprietary Java platform under the GNU General Public License (GPL) — the world's most widely used free software license.
FSF president and founder Richard Stallman said, "I think Sun has contributed more than any other company to the free software community in the form of software. It shows leadership. It's an example I hope others will follow."
http://www.fsf.org/news/fsf-welcomes-gpl-java.html