Kiva
Non-profit organization leveraging the internet and a worldwide network of microfinance institutions
LinkedIn
Fast-growing professional networking site that allows members to create business contacts
New America
Centrist Think Tank
Chan Zuckerberg Biohub
Innovative Medical Research Partnership - Stanford, UCSF, Berkeley
Arc Institute
AI-driven genomics research foundation
Zynga, Inc.
Biggest maker of games on Facebook