Oho Cards - Augmented Reality greeting cards
Felt for iPhone - Handwritten cards for the modern world
Cinemagraph eCard Builder - Send Christmas eCards containing "living photos"
Thankster - Automagically send hand written cards
Thankbox - Online group card & gift collection for teams. Like passing a card around the office but without the card.
Handwrytten - Handwritten notes straight from your device. Huge selection of cards or design your own. Handwriting service integrates with 1000's of apps.