But now there's a shadow hanging over Linux and other free software, and it's being cast by Microsoft (Charts, Fortune 500). The Redmond behemoth asserts that one reason free software is of such high quality is that it violates more than 200 of Microsoft's patents. And as a mature company facing unfavorable market trends and fearsome competitors like Google (Charts, Fortune 500), Microsoft is pulling no punches: It wants royalties. If the company gets its way, free software won't be free anymore.
The conflict pits Microsoft and its dogged CEO, Steve Ballmer, against the "free world" - people who believe software is pure knowledge. The leader of that faction is Richard Matthew Stallman, a computer visionary with the look and the intransigence of an Old Testament prophet.
Caught in the middle are big corporate Linux users like Wal-Mart, AIG, and Goldman Sachs. Free-worlders say that if Microsoft prevails, the whole quirky ecosystem that produced Linux and other free and open-source software (FOSS) will be undermined.
Microsoft counters that it is a matter of principle. "We live in a world where we honor, and support the honoring of, intellectual property," says Ballmer in an interview. FOSS patrons are going to have to "play by the same rules as the rest of the business," he insists. "What's fair is fair."
Microsoft General Counsel Brad Smith and licensing chief Horacio Gutierrez sat down with Fortune recently to map out their strategy for getting FOSS users to pay royalties. Revealing the precise figure for the first time, they state that FOSS infringes on no fewer than 235 Microsoft patents.