Jack of All Trade Universe
"JOATU is two things:
JOATU is a web application that allows you to offer all of the things you want including services & products to sell, give or loan. For example, I’ll grow you a tomato plant, tutor you, lend you a power-tool for an equitable exchange.
JOATU also stands for the Jack Of All Trade Unit. It exists as a complementary currency* that supports local community projects through direct democracy." (http://joatu.com/alpha/)