PeepSo

PeepSo is a super-light, free, social network plugin for WordPress that allows you to quickly and effortlessly add a social network or an online community, similar to Facebook right inside your WordPress site.

What sets PeepSo apart from other social networking solutions is its lightweight and stellar design. PeepSo works right out of the box and within seconds, you can start a social network, right inside your WordPress site. There’s no need to hire a developer. It simply works.