I'd add Apple but they're schizophrenic on the subject.
The iphone is closed, no wait now its kinda open and theres an easy to develop for app store.
OSX is kind of open source and uses a lot of opensourece conventions and you can get access to the kernel and all that easily...but you can't install it without a lot of hastle on non Apple hardware (which wouldn't be so bad if the only really good non laptop mac wasn't the 2300 dollar mac pro).
They are 100% open source and good on webkit though. Its publicly available, anyone can use it (they even let google make the competing chrome browser with it, no problem)
They also fund a decent amount of the open source community as well in exchange for integrating some of the best ideas from that community into OSX (Which acts a lot like a higher functioning linux build in a lot of ways, I can even run almost all Linux programs on it with a little work in Terminal).
They also fought (successfully) to have DRM stripped from all the itunes music, which was a good move, though after that they want to charge 30 cents to strip it off the songs I already own (which isn't so great).
I give apple a B or B+ for their openness and customer support. If you've ever taken a busted laptop into an apple store and instead of getting the runaround (MS customer service) you get free help and even a fresh laptop if the problem is really bad and its in warrenty, you know why I go that high. For laptops Apple just can't be beat.
I would subtract Valve from that list personally (I HATE being forced to use Steam, I tried using Dawn of War 2 a few days ago and for 2 days it was "not available at this time". Why the hell can't I just have it install to my hard drive and run like a normal friggin program, now its the same damn thing with to retail box of Total War!) they have forced a windows like framework for games and take a cut for the use of it from everyone.
I would much prefer the direct2drive model where I just download purchased games whenever I want and use them when I register them with my direct2drive code, no hastles.
I would instead add ID to that list, they support Linux and OSX directly (one of the few that make Linux games natively), they support Open GL and they make consistently good games to boot.
I would also, usually, add Google who does far more good then bad when it comes to being open and decent.
Sometimes I like Sony (they're open source about letting you install whatever linux build you want on the PS3, they let you swap parts of the PS3 with third party hardware, the PS3 will play just about any video codec no problem and work with any UPNP device) and sometimes not so much (memory stick instead of normal SD cards, proprietary formats, fighting for DRM with their media); they're kinda doomed by having their hand in too many industries to even be as upfront as apple much less google.
Almost any company is more open and better then MS though, they're the open source killers whenever possible. Every time I give them money or boot up vista I die a little bit inside.
PSN ID: ChosenOne feel free to add me
