Postly - Turn your photos into REAL beautiful postcards. Available on iPhone, iPad and Android. Make friends and family smile with a postcard!
CS183B - Startup Class - Stanford class taught by Sam Altman & guest speakers
Sutle - Save and organize resources into a directed learning path.
Classroomies - Watch Stanford CS & Startup lectures together
Golden - Mapping all human knowledge
Frond - A better way to build community online