SocialEngine is a PHP-based white-label social networking service
platform that installs a customized full-featured social network on a
Main features include administration of small-to-mid scale social
networks, complete customization capabilities, unencrypted code,
multilingual capability, and modular plug-in/widget compatibility. There
are a wide range of templates and add-ons available to extend the basic
features already included in the SocialEngine core.