
Description: Retrospring is a browser-based retro game engine for creating and playing classic 2D video games. It allows users to build and share retro-style games without coding through its intuitive drag and drop interface.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Tellonym is an anonymous messaging app that allows users to receive and send anonymous messages. Users sign up with a username and can then share their Tellonym link to allow others to send them anonymous tell messages.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API