CPAN isn't just a collection of modules. It's the world's largest collaboration platform. Sourceforge.net, launchpad.net, and github.com are just puffs of smo

CPAN isn't just a collection of modules. It's the world's largest collaboration platform. Sourceforge.net, launchpad.net, and github.com are just puffs of smoke by comparison. CPAN is 16,000 interoperable modules, most of which have comprehensive test suites AND test results across dozens of platforms. CPAN is a tradition of testing and test reporting. CPAN is a dialogue between users and developers. Lots of languages have reasonable libraries. Some even have de-facto collaborative communities. But only Perl has CPAN.