The Appropriate Technology Collaborative (ATC) is a cool local non-profit. They work with people in the developing world and U.S. based engineers and engineering students to create new sustainable technologies that promote economic growth and improve the quality of life for low income people worldwide. Full disclosure: my father is the executive director and I have worked with ATC in the past. This Sunday they will be presenting some of their work and having a fundraiser at Conor O'Neill's. The event is from 4pm to 7pm and there will be free snacks. Not too shabby. You can RSVP on Eventbrite and you'll get a nice printed name tag, or you can just show up.
ATC does some really cool stuff. Beyond working with low-income people in the developing world to create sustainable economic development, they allow engineering students in the US to get real world experience doing something very meaningful. The partnerships between the folks here in the US and the developing world end up producing some pretty amazing things.