Elgg is a robust open source social application engine. Elgg provides elegant, flexible and scalable solutions for organisations, groups and individuals. Take advantage of powerful social technology today.
Second Brain makes it really easy to keep track of all the content you have online. Bookmark web-pages and import content from your favorite internet-services. Organize everything in collections and share it on your public page.
"social networking services that really work are the ones that are built around objects. (...) Flickr, for example, has turned photos into objects of sociality. On del.icio.us the objects are the URLs. EVDB, Upcoming.org, and evnt focus on events as objec