Mailspring - Mailspring is a mail client for Mac, Windows and Linux.
POINT - Awesome link sharing/commenting with friends.
Geary - Geary is an email application built for GNOME 3.
LiquidText - LiquidText improves upon the reading experience by allowing users to better synthesize, visualize and collaborate over digital text.
The Bat - The Bat! is a secure desktop email client for Windows, designed to protect your correspondence against third-parties and to save your time.
Stellate.co - Everything you need to run your GraphQL API at scale