Felt for iPhone - Handwritten cards for the modern world
Greetabl for Business - Better than a greeting card, more personal than flowers.
Thankster - Automagically send hand written cards
love letters from craig - Strange exploration into Craigslist casual encounters (NSFW)
Handwrytten - Handwritten notes straight from your device. Huge selection of cards or design your own. Handwriting service integrates with 1000's of apps.
Eldermojis - 99 hand-drawn, naturally-aged emojis to empower the elderly