Miniature Mail - Little letters printed on demand and sent in tiny envelopes.
Thankster - Automagically send hand written cards
MailThis - Send mail from your computer
Bond - A simple app that reminds you to keep in touch with people
The Simple Postcard - Text a photo to mail it as a postcard
Fountain Greetings - Handwritten cards. Curated gifts. Right at your fingertips.