grou.ps
grou.ps allows you to create sharing platforms (just like web sites) for your social groups (alumni, colleagues, friends, communities etc)
You can share anything (to name a few; photos, communications, locations, bookmarks, tubes, files, blog entries (diaries), to-do lists, calendars)
radiusIM
radiusIM is all about location. It’s a free web service that shows you who’s around and let’s you IM them.
Hula
(Hula is currently alpha-quality software. It is under active development and is not yet ready for production servers.)
Hula is a mail and calendar server with a friendly web-interface designed for a great user experience.
Adoppt
A revolutionizing social networking platform
Adoppt is a community of online friends, diaries and journals. You can start your online journal (aka blog or weblog) for free, share thoughts and favorite web sites with your friends and meet cool new friends
Knacktion
At Knacktion, our goal is to help people to show off their many talents and get noticed. How? Via Knacktion.com: a free, easy-to-use way to display your talent and collaborate with others.
Users of Knacktion can sell their own content, rack up points (called clout) and interact with other users, all for free.
Empressr
(Alpha v. 01)
Empressr is the first Ajax/Flash-based web application that lets you create, share and store presentations online. It goes beyond current presentation applications by enabling you to incorporate rich media features, like streaming video and animation, to create and share the most dynamic presentations possible.