- Home: https://osu.ppy.sh/home
- Inspiration: Beatmania IIDX, Osu! Tatakae! Ouendan, Taiko no Tatsujin
- State: beta
- Download: https://osu.ppy.sh/home/download, https://github.com/ppy/osu/releases
- Platform: Windows, macOS, Android, iOS
- Keyword: music, clone, content open
- Code repository: https://github.com/ppy/osu.git (@created 2014, @stars 7951, @forks 1352)
- Code language: C#
- Code license: MIT
- Code dependency: .NET
- Developer: Adonais Romero González, Aergwyn, aitani9, Akash Mozumdar, Albert Tang, Albie, Alchyr, Alex Amadori, AlFas, alula, Andrei Zavatski, andy, anellie, Angela Zhang, apollo, BananeVolante, Bartłomiej Dach, Berkan Diler, BlauFx, Charlie, Christian Kamphausen, Christine Chen, ckie, clayton, Craftplacer, Damnae, Dan Balasescu, David Zhao, Dean Herbert, default0, Derrick Timmermans, Desconocidosmh, Dragicafit, Drew DeVault, Drezi126, DTSDAO, ekrctb, emu1337, Endrik, Fabian L, Fabian Lindgren, Fire937, Firmatorenio, frankhjwx, FreezyLemon, Fukashi13, Gabe Livengood, Gagah Pangeran Rosfatiputra, Ganendra Afrasya, Grrum, Hanamuke, Henry Lin, HoLLy, Huo Yaoyuan, ilsubyeega-desu, Ivan Pavluk, Jack Boswell, Jack Lee, Jack Scotson, JackLee9355, Jacob, Jacob Odgård Tørring, Jai Sharma, James58899, Jamie Taylor, Jan Jurzitza, Jarosław Zgierski, Jesse Myers, Jessica Meng, Jihoon, Jihoon Yang, JimmyC7834, John Neijzen, jorolf, Joseph Madamba, Joseph-Ramos-CMU, Justus Tumacder, jvyden, Kaleb, kamp, Keijia, Kelvin, KoziLord, kyekiller, Kyle Chang, Laica, LastExceed, Leon Gebler, Liam DeVoe, LiangXiang Shen, Lucas A., Maciej Sołtys, MafinBoy, Malox10, Marco Stephan, MATRIX-feather, Max, Max Hübner, MBmasher, McEndu, Mikal Stordal, MillhioreF, miterosan, Morguldir, Moritz Bender, n4b3l, Nabile Rahmani, Naeferith, naoey, Nathan Alo, Nathan Du, Naxess, nwabear, ocboogie, odgaard, Olle Kelderman, Opelkuh, Owen Young, Pasi4K5, Patrick Andersson, Paul Teng, PercyDan, phos, Piotrek Brzeziński, Poliwrath, Power Maker, Poyo, ProgrammaticNajel, ProTheory8, qwewqa, recapitalverb, RedMindZ, rednir, Remie Richards, RizonFTW, Robin Avery, Ron B, Ronnie Moir, RORIdev, roridev, Ryan Zmuda, Salman Ahmed, Samuel Cattini-Schultz, Samuel Huang, Santeri Nogelainen, Sebastian Krajewski, Seth, Shane Woolcock, Shawdooow, Shivam, StanR, su, Sunghwan Bang, Susko3, Swords, tgi, TheOmyNomy, ThePyrotechnic, Thomas Müller, Thomas Tan, Tim Nolte, Tim Oliver, Tom Arrow, TPGPL, Tyler, UselessToucan, Vidalee, Viktor Rosvall, Vincent Maggioli, VINXIS, Vladimir Pavlov, voidedWarranties, vperus, wildtree, Willy Tu, Xexxar, Yao Chung Hu, Инсур
See also: https://github.com/itdelatrisu/opsu, https://github.com/fluddokt/opsu, https://github.com/AnirudhRahul/opsu-Android