
Description: osu! is a free-to-play rhythm game developed by Dean Herbert. Players use a tablet/mouse to hit circles in time with the music. It has a huge library of user-created beatmaps and an online ranking system to compare scores.
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