Handwrytten - Handwritten notes straight from your device. Huge selection of cards or design your own. Handwriting service integrates with 1000's of apps.
SmallDevTools - Handy developer tools with a delightful interface
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.
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
The Simple Postcard - Text a photo to mail it as a postcard
Profitable developer tools database - A database of 103+ hand-curated profitable developer tools