Handwrytten - Handwritten notes straight from your device. Huge selection of cards or design your own. Handwriting service integrates with 1000's of apps.
Notif.me SDK - A Node.js lib to send all your transactional notifications
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.
Pusher Beams - Send push notifications programmatically at scale
The Simple Postcard - Text a photo to mail it as a postcard
Instapush - Instant notifications for transactions that matter.