SocialEngine.net/ is social network software that helps you build your own customized community websites. Start simple, or go feature-rich with plugins.
XIHA connects the people of the world through a multilingual, cross-cultural exchange. Simultaneous, real-time translation allows XIHA citizens to share travel tips, pictures, music, videos, games, knowledge and perspectives.
Appleseed is the first open source, fully decentralized social networking software.
Protect your privacy
Move around without losing friends
Support open standards
Seesmic Web is a web application helping to easily manage and build your community directly in your browser. You can now be connected to your Twitter community from home, school, work, or, actually, everywhere you might need it! Process your messages in an email-like interface, view and add to your Twitter lists and save your searches synced with Twitter.
Click at the "TagsInAction" link above to see how TagInAction works!
In the beginning there was the hashtag and the hashtag was all over the web and the web was a hashtag...
Your personal Life-streamer
GREAT READING EXPERIENCE - read your favorite blog posts and news in one place. Let the best content on the web come to you
LIMITLESS SHARE - send cool articles, photos, and videos to your scattered friends all over the world
AWESOME INTERACTION - start discussions, engage people, and monitor everything that happens on your social web from the same place
isalso.at is a web service that lets you access all your social sites through a single launching pad. Enough with the typing already - add
a switchboard to your social web and make it easy to click in.
weblin makes you and others on the Web visible as small avatars. There are others on the same page you are on right now. Weblin opens a new and exciting world on every web site.
Do you want to enter this world? Get your personal weblin now!
an extension to the Atom feed format to express what people are doing around the web
Join the mailing list. Contribute to the wiki, or fork us on GitHub.
The Activity Streams format has already been adopted by Facebook, MySpace, Windows Live, Google Buzz, BBC, Opera, TypePad, Gowalla, Gnip, Superfeedr, YIID, and many others.
"On Clipmarks.com, you can see clips of text, images or video about all sorts of topics that people find while surfing the web.
The idea is that through each other, we can learn, understand and enjoy more than we could alone. As you find people who post clips that interest you, make them a Guide."