Thousands of items in beaucoup categories — art, books, electronics, medical supplies, and much more. Free registration.
Good place to arrange house swaps, i.e., two weeks in Chicago for two weeks near Disney World. Free registration.
Barter Your Services (www.barteryourservices.com)
If you’re a CPA looking to trade an audit for a stint with a personal trainer, check out this site. Joiner fee: $18 for three months or $48 for one year. — Chris Tucker