BuddyPress is a small plugin that allows you to build your own social network and integrate it in your website.

It is very useful if you plan to create your own network for a certain office space or a sports team or any other small to medium place that more people frequent.

Now it may not grant you the same advantages as a fully grown social network, but it does its job quite well.

If you need it for any project, go for it and get it. It costs next to nothing and its usefulness is uncharitable. It easily makes up for the price it goes for.

It can be downloaded from the official WordPress site.

I myself, highly recommend this plugin as it is one of the best.