It was eight years ago that some computer programmers got together and issued a manifesto for something they called open source software. Conventional software development–kept hidden behind walls of intellectual property, copyright, and secrecy–was clumsy and slow. It would be far better, the open source advocates declared, to make software open to all. It would foster the growth of a vast decentralized community of developers and consumers who could work together to create better software together. Individuals would grab software created by others, tinker with it, and then make it available in turn to the community for more testing and tinkering.

The open source movement may not have taken over the world yet, but it certainly has thrived. Take a