Felt for iPhone - Handwritten cards for the modern world
Vue Native - A framework to build Native Mobile apps using JavaScript.
Handwrytten - Handwritten notes straight from your device. Huge selection of cards or design your own. Handwriting service integrates with 1000's of apps.
AnyPixels.js - A web-friendly way for anyone to build unusual displays
Token - One ring to replace your keys cards and passwords
Facebook Design Resources - A collection of free resources made by designers at Facebook