Some popular hosting providers (Dreamhost) offer this social media CMS so you can create self-hosted bookmarking site Reddit.It specializes in creating social publishing networks, where users submit and promote content similar to sites like Digg, Reddit, and Mixx.
Oxwall is used for a wide range of projects starting from family sites and custom social networks to collaboration tools and enterprise community solutions. Open Source PHP Script, Etano lets you create a social network, dating website and other collaborative sites.
It doesn’t really offer many unique features, but it can surely suffice for a small social networking project.
Since the year 2000, we have been building tools that unite people, helping hundreds of thousands of aspiring webmasters.
And yet, we saw that starting a social networking website can be needlessly complicated or overly limiting — most solutions require technical skills or won't let you customise the site.
You can create a website like Facebook with this open source.