
Description: Mr. Mail is an email marketing software that helps small businesses create, send, and track email campaigns. It has a drag-and-drop email builder, templates, contact lists, and basic analytics.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Vivaldi Webmail is a free, open-source webmail client developed by Vivaldi Technologies. It offers an intuitive interface, support for multiple accounts, calendar and contacts syncing, and custom themes.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API