The IOWEYOU project. You can't go to a shop and buy these clothes. Because each textile is unique they have an app that allows you to trace your garment right back through the production process to the actual weaver that hand-wove the fabric. You can see some of the delightful people involved in the project at their YouTube channel.
Enjoy volunteering? Time banking allows you to get something back for your efforts. It's even the official currency of the micronation Lovely. Via
BillMonk is a new way of tracking informal debts with your friends. Web 2.0 nonsense or a viable solution to those awkward 13-way restaurant bills? Not to be confused with Zopa, another social money project...