
Description: FairEmail is an open source, privacy-focused email app for Android. It supports multiple accounts, end-to-end encryption, and blocks trackers and ads. FairEmail is lightweight, customizable, and respects user privacy.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Betterbird is a free and open source alternative to Twitter. It has similar core functionality like tweeting, following other users, liking and retweeting posts. Betterbird focuses more on chronological timelines rather than algorithmic feeds.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API