
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: Quaver is a free, open-source rhythm game inspired by classic games like Guitar Hero and osu!. It features custom song mapping, multiplayer game modes, in-game editors, and cross-platform support.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API