Social Network UsersThere are lots of social networks from small to huge ones like Facebook or MySpace.

Although trying to create the next Facebook may not be a good idea, you may want to create a niche network or empower & add new features to the network you already have.

Here are 6 open source social networking applications which are developed continiously, well-documented & offer impressive functions.

Elgg

Elgg

Elgg is a mature social networking framework which offers:

  • advanced user management and administration
  • social networking
  • cross-site tagging
  • powerful access control lists
  • internationalisation support
  • multiple view support (eg cell phones, iPhone)
  • an advanced templating engine
  • a widget framework and more.

Its plugin based system enables adding new features easily from a plugins database or creating your own.

Elgg is built with PHP / MySQL & comes with a JSON API.

PHPizabi

PHPizabi

PHPizabi is a feature-rich open source social networking engine for creating & managing basic-to-advanced communities.

It is built with PHP / MySQL & besides every feature that can be thought for a social networking site, it offers:

  • a multilingual interface
  • mass mailing to users
  • creating blogs
  • forum integration & more

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