Take a look at these sites

 

hOurworld — official website of hOurworld

TimeBanks USA — official website of TimeBanks USA, Washington DC

Dane County TimeBank — official website of the Dane County TimeBank of Wisconsin

Portland Hour Exchange – official website of the Portland Hour Exchange of Maine

New Economics Foundation -official website of the New Economics Foundation of the United Kingdom

TimeBanks United Kingdom – official website of the TimeBanks of the United Kingdom