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# Music

- **[Frets on Fire X](../frets_on_fire_x.md)** (Python, GPL-2.0, mature)
- **[Frets on Fire](../frets_on_fire.md)** (Python, GPL-2.0, mature, inactive since 2008)
- **[Performous](../performous.md)** (C, C++, GPL-2.0, mature)
- **[PyKaraoke](../pykaraoke.md)** (Python, LGPL-2.1, beta, inactive since 2011)
- **[StepMania](../stepmania.md)** (C, C++, Lua, MIT, mature)
- **[UltraStar Deluxe](../ultrastar_deluxe.md)** (Pascal, GPL-2.0, mature)