
Description: NikaMail is an open-source, privacy-focused email service. It allows users to send and receive encrypted emails for free without ads or user tracking. NikaMail uses end-to-end encryption to keep emails private.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: MailerQ is an open source message queue for sending large volumes of email efficiently. It can process millions of messages per minute with low latency using concepts like event looping, message storage, and parallel processing.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API