Tuner Eclipse - A simple and accurate guitar tuner for iOS

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

Fender Tune - Free guitar and bass tune iOS app

Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

Roadie - The first neighbor-to-neighbor shipping network

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.