We are based here at the BRAC Centre for Development Management (BCDM),which is an educational retreat centre about an hour and a half outside Dhaka, set up by BRAC. BRAC is the largest NGO in the world (or at least it was when I first heard of it about ten years ago - that Wiki article uses "one of the largest"). It's an incredible organisation doing some really amazing work in the country covering health, education and development.
Bangladesh seems to have something about it as it is also the home of the Grameen Bank, which was founded by Mohammed Younus, winner of this year's Nobel Peace Prize, which is another amazingly successful organisation in helping alleviate poverty. Both articles are well worth a read if you're at all interested.