
Description: Caliopen is an open source and privacy-focused email and communications client. It allows users to send encrypted emails and messages without relying on large tech companies to handle their private data.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Rambox is a free and open source communication and productivity platform that combines common web applications like email, chat, calendar, and more into one unified interface. It allows you to manage and access multiple web services in one place for improved productivity and convenience.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API