Strangely, there aren’t many open-source social network packages out there. Some commercial packages such as PHPFox will give you access to an “unlocked” code base, but are built off of antiquated technologies (such as using tables for layout) and are not free. Few are truly open-source, free, well-designed, and use sane development standards. Most are rather limited and are cashing in on the now well-established popularity of social network sites.