I borrowed this list from the back of Design for the Other 90 Percent. What an inspiring, helpful, and well designed book. You will note that probably just 25% of these organizations are directly concerned with design (however another 50% are concerned with development issues, which have design based concerns in the bottom of the pyramid context). However, I think its a great list for those in the design communities who want to connect with socially conscious designers and development professionals.
Update:Project H Design should probably be added to the list of BOP designers. You can learn more from this design conference video featuring Emily Pilloton humanitarian product designer and founder of Project H Design. (I’m looking forward to reading her sustainable design manifesto as well as the design accord for sustainability)