
Description: Postler is an open-source desktop email client for Windows, Mac, and Linux. It has support for multiple accounts and email providers like Gmail, Outlook, Yahoo Mail, and iCloud. Key features include customizable themes, powerful search tools, email scheduling, read receipts, and offline access.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Mailbird is an email client for Windows that focuses on customization, speed, and privacy. It has a clean, ad-free interface, powerful organization tools, and robust encryption options.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API