Doodle for Messenger - Doodle Anything and Send it on Facebook Messenger
Expert Republic - 1-1 Video consultations with experts from any industry
ScribbleBoard - iOS8 Keyboard for hand drawing your messages
Iceberger - Draw an iceberg and see how it will float
Anvil PDF Filling API - The easiest way to programmatically populate any PDF
Sketch - Professional digital design for Mac.