Handwrytten - Handwritten notes straight from your device. Huge selection of cards or design your own. Handwriting service integrates with 1000's of apps.
POINT - Awesome link sharing/commenting with friends.
Mailjoy - Delightfully easy direct mail marketing. A DIY direct mail tool created for marketing and growth teams. Design, mail & track personalized direct mail postcards and letters. Digital marketers use Mailjoy to send data-driven mail campaigns.
microChange - Snapchat-Venmo hybrid for donating.
The Simple Postcard - Text a photo to mail it as a postcard
The Groundwork - The API for building modern movements