OS/2: the Open Source Laboratory
Remember OS/2? It was the going to be the “real” operating system that took over from the mickey mouse Windows.... Somehow, that never quite happened (can't imagine why), but OS/2 aficionados remain as loyal to their OS as any Mac fanboy.
One interesting suggestion that crops up periodically is that IBM should open source OS/2. There's a lot to be said for the idea – IBM can stop worrying about it and hand it over to the people best placed to move it forward. Alas, that's not going to happen.
I suspect it's the legal reasons that are the real problem: there's probably too much stuff that can't easily be cleared for release as open source.
Undeterred, the OS/2 community have come up with another way to support their beloved OS: