A good way to help us is to link to this page, thereby boosting its pagerank, possibly near or past the homepage of the offender. We discourage you from using or buying the software listed here, unless you do so to demand that its producers comply with the license of Libav.
Our issue tracker also contains a list of license violations. If you become aware of license infringements, please notify us on the libav-devel mailing list and/or add it to our issue tracker.

(in alphabetical order)

The companies below are not yet in full compliance, but we are in negotiations with them and making good progress towards compliance.