
Description: Boomerang Mail is an email productivity plugin and service that allows users to schedule emails to be sent at a later time or date. It also offers features like email reminders, templates, and read receipts.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Mailbutler is an email management app for Mac that helps organize, schedule, and track emails. It has features like snoozing emails, send later, reminders, templates, analytics, link tracking, and read receipts.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API