Kiva.org is a microloan organization, which allows people to donate $25 to help people out around the world with their small businesses.

You choose who to lend to - whether a baker in Afghanistan, a goat herder in Uganda, a farmer in Peru, a restaurateur in Cambodia, or a tailor in Iraq - and as they repay their loan, you get your money back. It’s a powerful and sustainable way to empower someone right now to lift themselves out of poverty.

This is a standard 50x50 stamp:

I made this stamp so I could show my support. It'd be wonderful if you joined in too!

The regular Kiva stamp is also available.