A month ago Gnome was hit by patent troll for developing the Shotwell image management application. They stated:
It’s the first time a free software project has been targeted in this way, but we worry it won’t be the last. Rothschild Patent Imaging, LLC offered to let us settle for a high five figure amount, for which they would drop the case and give us a licence to carry on developing Shotwell. This would have been simple to do so; it would have caused less work, cost less money, and provided the Foundation a lot less stress. But it also would be wrong. Agreeing to this would leave this patent live, and allow this to be used as a weapon against countless others. We will stand firm against this baseless attack, not just for GNOME and Shotwell, but for all free and open source software projects.
This is very important cause worthy to fight for. We should support the Gnome Foundation so that patent trolls should never target free software by making a donation to the GNOME Patent Troll Defense Fund.