
Description: Screech is an open-source alternative to Skype focused on security and privacy. It provides end-to-end encrypted video/voice calls and chat powered by the Matrix protocol.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: PenPal World is a pen pal matching service that connects people from around the world to exchange letters and emails. It allows users to find pen pals based on shared interests, language learning goals, age groups, and regions of the world.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API