Kiva.org is the world’s first peer-to-peer, distributed microloan website. A great idea where PayPal meets Gates Foundation. The site allows you to lend a small amount of money, say $25, to needy microenterprises in developing countries. You receive repayment at the end of the loan period (normally 6-12 months) without interest. If they default on the loan, your loan becomes a donation – though none of the businesses have defaulted yet. A great low-risk, high-reward idea.