Engage Spark - http://www.engagespark.com/

Started by a serial entrepreneur from Boston, right now they're building tools to help NGOs reach people in abject poverty, and they have some really big ideas for the future.

They're based in the Philippines and actually are currently looking for developers to come over on 6-12 month fellowships to experience life there and contribute to the core product. If anyone is interested, I can link you to the relevant posting.

(not affiliated, just think what they're doing is awesome)