A list of links to projects isn't very similar to CPAN at all. CPAN is a distributed archive network with sophisticated automatic indexing, which is both more useful and much more complicated than a simple list of links. There's a good reason that no other language has anything close to the size and scope of CPAN - it's a heck of a lot of work to create and maintain! Worse, it requires a massive social effort to get everyone to actually use the same system.