Habitat for Humanity (Score 1)

Habitat is a great organization to work for: it benefits folks both in the US and abroad, both at a basic social service level (you get a roof over your head) and at a more long-term, community-building level. I've worked with them at the local affiliate level in a non-technical job, but they often have tech jobs available to assist with their infrastructure. Most of those jobs are located at their headquarters in Georgia, but the occasional international posting comes through. Check out Habitat's HR Page for details.