
Description: Sylpheed is a free and open source email client for Windows, Linux, and other Unix-like systems. It has basic email features like IMAP and POP3 support, email composing, contact management, and email filtering and searching. Sylpheed is designed to be lightweight and fast.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Mutt is a free, open source email client for Linux, Unix, and macOS systems that emphasizes speed, flexibility, and security. It supports features like keyboard shortcuts, threading, PGP encryption, and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API