Handwrytten - Handwritten notes straight from your device. Huge selection of cards or design your own. Handwriting service integrates with 1000's of apps.
Socialkeeper - Cultivate your friendships
Handwriting.io - Real handwriting without the pen – no robots, all software
Thankbot - Drive more business with handwritten notes
Future Me - Send an email to your future self
Thankster - Automagically send hand written cards