@Gulliver: what about building a list of software that has been released as free and/or open source ? Could be useful. You could also use that to convince more people to release their software...
Okay, so that you know who I contacted, and the results I got so far:
Tobias Abt - Picasso96 - Got a response, it was NO
Heinz Wrobel - Envoy3 - Got a response, it was NO
Chris Hames - PCTask - YES to binaries
Michiel Pelt - PFS3 - YES to binaries and source, but will have to wait till he solves some issues
Holger Kruze - Miami Deluxe - Awaiting answer. Still to early to declare unanswered
Thomas Frieden/Hyperion - Warp3D - No answer
Stefan Stuntz - MUI 3.8 - No answer
Stephen Fellner - RiVA - Yes, but doesnt have enough time to look into the matter and release it