NetworX is a social media and networking technology open source platform for businesses and organizations. Using NetworX companies can easily create online communities and corporate marketing initiatives to drive customer loyalty and increase customer experience.

Noosfero is a web platform for social networks with blog, e-Porfolios, RSS, thematic discussion and events agenda in the same system! Get to know, use it, participate and contribute to this free software project!

Box Social is a piece of Open Source Social Networking software written in C# for the Mono .net framework platform. The project exists to develop the software that powers ZinZam, but can be freely used by anyone. In fact you are using it right now. Box Social doesn't currently make formal releases, but there is an SVN repository online that you can download the current state of the software from.

Ozcode is the source code behind Ozmozr.com, a microformat-aware RSS aggregator, social networking, resource sharing, identity aggregation and presentation site.Ozcode is the source code behind Ozmozr.com, a microformat-aware RSS aggregator, social networking, resource sharing, identity aggregation and presentation site.

Almayer is a fully featured community manager. With Almayer you can share your photos, video, audio, give titles or notes to any media or user, mantain your own list of friends, obtain statistics or charts, mantain a blog, send postcard and so on...

2daybiz Social Community site php script is an online social networking software that allows you to start your own site...

i-Net Online Community site php script is an online social networking software that allows you to start your own site just like Myspace, Hi5 and Facebook. This community script allow members to connect people in their personal networks and people can create a new online interactive resource that is based on a trusted network of friends and associates on the internet.