Mailspring - Mailspring is a mail client for Mac, Windows and Linux.

Wren - Offset your carbon footprint by saving rainforests

Geary - Geary is an email application built for GNOME 3.

Capture - A great free screen capture utility that allows you to capture either a window or the desktop and save it to either a file or the clipboard.

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.

Treepoints - Fight climate change and earn rewards