Diaspora是“一个分布式网络，在这里所有离散的电脑相互之间将直接连接。它能让人们在保留个人隐私的前提下互相连接。”目前，开发团队正在集中精力研发“清晰、前后关联的共享功能”，希望解决“何种信息与众人共享，何种信息与密友共享？”这两个问题。...

iweb SNS, 是一款功能强大且易于扩展的LAMP开源社交网络平台软件。它基于iweb SuperInteraction(简称iweb SI)框架开发。借助iwebSI平台，站点可以轻松获得支持热插拔及快速增加新节点的集群计算与处理能力（分布式计算与存储/高可用性/负载均衡），以方便管理web2.0类站点持续增长的数据量。SI的web层、db层负载均衡，基于内存的分布式缓存系统、dfs（分布式文件系统）、分布式数据存储等可以轻松支持站点拥有服务于百万甚至千万级庞大用户群的能力，并且不管这些交互式服务的请求是来自计算机还是移动终端。...

Feed Me Links stores your bookmarks online so you can get to them anywhere. Import your favorites and share your links with friends. Add tags to organize your links. Discover new things....

sabros.us基于PHP+MySQL搭建的开源网络书签类似于del.icio.us。可以利用它在线添加和组织你的书签，共享和挖掘其它有趣的网站。...

Facelift is a visualization and analysis software for online social networking services. It displays a given community as a node-link diagram and provides several search / filtering functions as well as cluster analysis features.......

Mitter 是一个用来跟踪 Twitter 状态的小程序 GTK窗口界面： 控制台窗口界面：...

The Mugshot site lets you track what your friends are doing online across a variety of popular web sites � music, photos, blog posts, and more....

Clonesumating is the open source version of the code that runs CONSUMATING.COM. It features many state of the art social networking functions including user profiles, user tagging, matching and discovery based on quirky tag combinations, group activities such as weekly photo contests and blog questions, an event calendar, RSS feeds for everything, etc. It is written primarily in mod_perl.......

开源Web书签系统，允许多个用户在线存储，共享和Tag他们喜欢的链接。...

国外开源DIGG程序，比较简洁，支持多语言，支持评论、RSS等...

jChatBox 是采用 JSP 开发的聊天室程序 在线演示地址：http://www.javazoom.net/services/jchatbox/jchatbox.html...

PBDigg 是基于PHP + MYSQL的开源Digg社区资讯系统，经过完善设计并适用于各种服务器环境，如：UNIX、LINUX、WINDOWS等，是一个高效、全新、快速、优秀的网站解决方案。...

diggCLone 是另外一个仿 digg 的程序...

WorldSpace is a user-extensible shared virtual environment, aimed at being a next-generation social networking system....

Social Networking Open Source Software, an open source social networking framework, written in PHP, Javascript and MySQL with an AJAX UI....

insoshi也是一个类似Facebook的建站程序，基于Ruby on Rails构建。 演示站：http://demo.insoshi.com/...

A networking site on the lines of Orkut.Right now we plan to build it on Jboss seam and use a Java content management system like apache Jackrabbit as the backend. It would be more of a POC than an actual commercial app.......

演示站点：http://demo.mahara.org/ Mahara is an open source e-portfolio, weblog, resume builder and social networking system, connecting users and creating online learner communities. Mahara is designed to provide users with the tools to demonstrate their life-long learning, skills and development over time to selected audiences. Mahara means 'think' or 'thought' in Te Reo Māori. The software i......