Gift Flow is a “social recycling” site created by recent Yale graduates that keeps your gifts of time, talents and treasures flowing in your community.
Here’s how it works: individuals log onto GiftFlow and create a profile where they list everything they have to give away (ranging from a spare jacket to an hour of volunteer time) and everything they need. You give what you can to get what you need. Each transaction is recorded so that individuals can gain a reputation for contributing to their community. (http://trustcurrency.blogspot.com/2010/08/why-we-started-giftflow.html)