A microblogging client for the iPhone that can post text and pics to Twitter, Facebook, Tumblr, Flickr or mlkshk, either individually or to multiple services at the same time. The app also stores a all your entries, and lets you export them as plain text and images.
ThinkUp is a free, open source web application that captures your posts, tweets, replies, retweets, friends, followers and links on social networks like Twitter and Facebook. With ThinkUp, you can store your social activity in a database that you control, making it easy to search, sort, analyze, publish and display activity from your network. All you need is a web server that can run a PHP application.
Update: Great technical and philosophical introductions to ThinkUp from Gina Trapani and Anil Dash. Also of note, the ThinkUp Launcher which gets the app up and running on Amazon EC2.
An interesting way of sharing links—use a bookmarklet to save pages of interest, and Handpick will send a digest of the day’s URLs to your friends via email.
I can see this working really well for a small group of friends, colleagues or any group collaborating on a project (as long as they all use Macs). It’s also a good example of the future of Dropbox as a platform, not just a file synchronisation service.
A social networking site designed for small, ad-hoc, private, invitation-only groups; you can set up as many groups as you like.
It’s interesting to see a simple, hosted response to the Facebook privacy kerfuffle pop up, in contrast to the distributed, self-hosted, not-quite-so-simple solutions from Appleseed, Diaspora, GNU Social et al..