
Description: McOsu is a free, open source rhythm game and osu! client for Minecraft. It allows players to play user-created beatmaps in Minecraft with mouse and keyboard controls similar to the game osu!.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Frets on Fire is a free, open-source music video game that allows players to use a guitar peripheral to simulate playing songs. It features a large library of user-created songs and game modes for both single player and multiplayer.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API