GoLocalBot. The project is closed - Platform for volunteers, NGOs, activists and crowdmapping.
My Friends Love Gifts - Find the best gifts for all your friends birthdays
GivingWay - Travel the world, do some good.
Risu - Making gifts easy to buy and fun to open
Catchafire - Use your professional skills to help charities
Envoy - Visitor registration that's changing how guests are greeted in companies around the world.