I made a post on online communities before but there's a new open source package out called oxwall  from oxwall.org and it allows you to make a Facebook like website.

I've mentioned other online community or social network solutions, but Oxwall offers some significant advantages.
Many social-networking solutions out there seem free, but after installation you find out that essential plugins are missing. When you go to purchase the plugins, you find out they cost quite a bit.
Oxwall on the other hand, is completely open source and the plugin are also free.

Oxwall provides over 130 plugins ranging from chat, video, games, music, utilities and more. It allows users to create blog posts within the network which is great SEO.

Oxwall even supports a forum to help troubleshoot any problems that may arise.

Oxwall