Did you ever dreamt that you could build your own community site, like the over-popular Facebook and Google+ ? A few months ago, an open-source project named Diaspora was launched, with the promise of letting you create your own community site. But Diaspora is written in Ruby and have lots of dependencies, wich make it hard and boring to install.
Happilly, I found a really good alternative named Oxwall. It is open source, it is free, and it is written using PHP.
Oxwall features most of the things who made Facebook a succesful website: Wall, photo management, friends, activity, groups, and so on. But the best feature in my opinion is that you can either download the software and install it on your own server, or use Oxwalls Wall.fm service to create your own network just like youll create a blog on WordPress.com.