Linus Torvalds
Creator, Linux
It's a testament to the success of Torvalds's open-source ideas that he's on this list at all. His Linux operating system is fast, cheap, and out of control - and that's entirely by design. While Torvalds still oversees any changes made to the innermost core of Linux, most of the innovation is now done by others, and commercial businesses like Red Hat and Novell increasingly steer its future. Although he can claim credit for popularizing one of the most powerful ideas ever to sweep through the software industry, Torvalds's project has matured to such an extent that it's largely outgrown its illustrious creator.