"As the Free Software Foundation (FSF) works toward finalizing
the next version of the GNU General Public License (GPL), free
software developers are still trying to make sure companies are
complying with the current version of the GPL.
"Violations of free software licenses are usually handled
differently than violations of proprietary software licenses.
Developers aren't looking for money or to punish competitors, but
simply to enforce compliance with a license that requires
reciprocity. Though a few violations have been widely reported,
many more are settled quietly..."