
Description: Airmail is an easy-to-use email client for Mac that focuses on speed, simplicity, and user experience. It has a clean interface, fast search, support for major email services like iCloud, Gmail, Outlook, and Yahoo Mail, and robust customization options.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: K-9 Mail is an open source email client for Android focused on security and privacy. It supports multiple accounts, search, tagging, notifications and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API