pH7Builder (formerly known as pH7CMS) is the first Professional, Free and Open Source Social Dating Site Builder Software. By far, the first choice for creating enterprise-level Dating Apps/Service or social networking sites. This Social Dating Web App is fully coded in object-oriented PHP (OOP) with the MVC pattern (Model-View-Controller). It is low resource intensive, extremely powerful and highly secure. pH7Builder is included with over 42 native modules and based on its homemade pH7 Framework which includes more than 52 packages.

Dolphin is the world's most advanced community software. Open-source, independent, downloadable, scalable, customizable, full-featured, free software for building social networks, dating sites and web-communities. Loaded with video chat, recorder, video player, forums, groups, events, video messenger, mailbox, desktop app, video sharing, photo sharing, iPhone app and much more. Build your own business or advance your hobby with Dolphin!

Oxwall is unbelievably flexible and easy to use PHP/MySQL community software platform. Oxwall is used for a wide range of projects starting from family sites and custom social networks to collaboration tools and enterprise community solutions.

Jcow is a flexible Social Networking software written in PHP. It can help you to: * Build a social network for your interests and passions. * Build a member community for your existing website. * Build a social networking site like facebook/myspace/twitter.

Open Source Social Network also know as OSSN is a social networking software written in PHP. Open Source Social Network allows you to make a social networking website, helps your members build social relationships with people who share similar professional or personal interests.

HumHub is a free social network software and framework built to give you the tools to make communication and collaboration easy and successful. It's lightweight, powerful and comes with an user-friendly interface. With HumHub you can create your own customized social network, social intranet or huge social enterprise application that really fits your needs.

Etano can be used to start up a dating site, a social networking site, a classifieds site or any other type of site involving groups of people, companies, products.

UNA is a Community Management System for building and running modern social websites. UNA (United Networking Applications) is a customizable open-source social networking platform. Every component module, tool, template or language is treated as an “app”. Apps control customization of design and navigation; the addition of new features and integration of 3rd-party APIs; site monitoring and configuration; permissions and database structure setup; translation and texts editing. UNA is the “next-generation” social software platform, developed for enterprise-class clients requiring a custom solution, deep integration with existing infrastructure and extended ongoing support. UNA is a fully responsive system, with mobile and tap-friendly layout, optimised for all screens sizes.

Family Connections is a Private Social Networking Share pictures and videos. Have discussions. Start a family tree.

Hubzilla is a powerful platform for creating interconnected websites featuring a decentralized identity, communications, and permissions framework built using common webserver technology.

GNU social is a continuation of the StatusNet project. It is social communication software for both public and private communications. It is widely supported and has a large userbase.

Elgg empowers individuals, groups and institutions to create their own fully-featured social environment. Elgg, started in 2004, is an open source social engine which powers all kinds of social environments - from education and business to martial arts and rugby. If you are looking for a professional social intranet or want to run a site for your organisation, Elgg is a great choice.