MoMAR - AR gallery within the MoMA + open source
Aseprite - Aseprite is an art program dedicated to the creation of pixel art.
Wanderlog Pinboard - A digital corkboard: map your and your friends' travels
Pixel Art to CSS - Draw and animate pixel art, export the results to CSS
dropdrop - Leave messages where you travel for others to discover
Piskel - Piskel is a website where designers online create sprites or pixel art.