In Spain (particularly the Catalonia region) there is a growing number of exchange markets. These barter markets or swap meets work without money. Participants bring things they do not need and exchange them for the unwanted goods of another participant. Swapping among three parties often helps satisfy tastes when trying to get around the rule that money is not allowed.
Similar to Zipcar but owned by car rental company Hertz, Connect by Hertz focuses on car sharing services on or near college campuses around the world. Membership is free, and hourly rental rates start at $6.80, which includes gasoline and insurance. Again, for those of you who rarely need a car of your own, a car sharing service could save you a bundle over the costs of ownership.
Adam Smith, the father of modern economics, sought to demonstrate that markets (and economies) pre-existed the state, and hence should be free of government regulation. He argued (against conventional wisdom) that money was not the creation of governments. Markets emerged, in his view, out of the division of labour, by which individuals began to specialize in specific crafts and hence had to depend on others for subsistence goods. These goods were first exchanged by barter. Specialization depended on trade, but was hindered by the "double coincidence of wants" which barter requires, i.e., for the exchange to occur, each participant must want what the other has. To complete this hypothetical history, craftsmen would stockpile one particular good, be it salt or metal, that they thought no one would refuse. This is the origin of money according to Smith. Money, as a universally desired medium of exchange, allows each half of the transaction to be separated.
While the original idea for Rehash was to design clothing out of recycled clothes, it eventually evolved into a site for trading clothes with other users. Members can trade their unwanted stuff (clothing and accessories) with others who are looking for new items for their wardrobe, and vice-versa. Rehash also acts as a social community where users can get green living advice, read articles, request items, and attend swap events. Membership is free to interested parties.
For $75 per year, Capital Bike Share gives members access to inexpensive bike rentals around the Washington, D.C. area. Bike stations filled with 1,100 bikes are located all over the district and nearby towns, and a single membership key grants you access to use and return any of them wherever you are. The first 30 minutes are free, and each additional half hour costs a few bucks. Members can also use the SpotCycle app for the iPhone, Blackberry, and Android device to locate the closest available bike. You can also try a limited plan, like a 30-day pass for $25.