Social Networking Scripts

Dolphin

Cross-platform

Build your own social network, dating site or online club with free, powerful open-source software that you host, control, customize and extend. (CC)

Elgg

Cross-platform

Elgg is an open, flexible social networking engine, designed to run at the heart of any socially-aware application. (GPL)

Lovd by Less

Cross-platform

Built with Ruby on Rails, Lovd is a social networking solution that has everything you need to build your community. (MIT)

Pligg

Cross-platform

Pligg CMS provides social networking software that encourages visitors to register on your website so that they can submit content and connect with other users. (AGPL)