MoMAR - AR gallery within the MoMA + open source
YouTube - Our mission is to give everyone a voice and show them the world.
Wanderlog Pinboard - A digital corkboard: map your and your friends' travels
Facebook Gaming - Watch and stream live games on Facebook
dropdrop - Leave messages where you travel for others to discover
YouNow - YouNow is a free social networking app that allows you to connect with other users via live video broadcast.