Galaxia - Mini social networks for all your personas
Mailspring - Mailspring is a mail client for Mac, Windows and Linux.
Mastodon - Mastodon is a decentralized, open source social network. This is just one part of the network, run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome!
Geary - Geary is an email application built for GNOME 3.
Caret - Better Markdown Editor for Mac / Windows / Linux
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.