[Taqwus]

Descent's also open-source, and ditto with Hexen. Yes, Q1 too.

...with the caveat that id Software and other companies may open up the engine code (at least the parts they have copyright on), but generally don't relax licensing requirements for the data files.

StarOffice (well, now it's... OpenOffice, IIRC) was a full-blown commercial office suite, for multiple platforms, that got bought by Sun and opened up. But Sun, being huge, has far more revenue lines than Malfador and Shrapnel.

There are also interesting free clones of commercial games out there, like FreeCiv and so forth. And many darn good non-commercial games like Xconq. But for now, MM has better things to do...

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-- The thing that goes bump in the night