Circuito.io - Instant code and wiring for your project
Madame Tussauds - Crowdsourced 3D scanned gallery of the celebrity museum
library.io - Learn electronics and easily create circuit boards online
DeviantArt muro - DeviantArt muro is an HTML5-powered drawing application that lets you create artworks using the simple touch of your fingertips.
B4R - Development tool for native Arduino programs.
Sketchfab for Museums - Browse thousands of cultural artifacts in 3D and VR