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osu!api — Public API for accessing osu! related data.
osu!framework — A game framework written with osu! in mind.
osu!(lazer) — The future of osu! and the beginning of an open era.
osu!performance — Player ranking metric of osu!.
osu!stream — A different style of osu! for iPod Touch, iPhone, and iPad.
osu!web — The browser-facing portion of osu!.
osu!wiki — Houses information about osu!.
Caution: Use at your own risk! The projects listed below are not endorsed by osu!, nor do they have any official support.
Tools and/or services made by the osu! community. Feel free to add your own osu!-related projects to this list.
McOsu — A free open-source circle-clicking rhythm game practice client for osu! beatmaps with Virtual Reality support.
opsu! — An unofficial osu! client written in Java.
osu!droid — An unofficial osu! client written for Android, open source.
戳泡泡 — A Chinese clone of osu!.
Circleguard — A replay analysis program typically used to check for instances of cheating.
OpenTabletDriver — Open source, cross-platform, user-mode tablet driver
osu! Replayer — Allows you to view and save your replays after backing out of the ranking screen.
osr2mp4 — An application that converts replay files to videos.
osu! Miss Analyzer — A program that takes a replay and analyses every miss to determine how and why it happened. It's straightforward to use and shows some pretty interesting data.
danser-go — CLI visualisation tool for osu!standard maps. Can also be used to render replay files as videos.
osu!speed — Determines one's tapping speed.
you suck at streaming v2 — Determines one's tapping speed.
gosumemory — Cross-platform memory reader for osu!
JKPS — A keys-per-second program that can be used as a input overlay with a lot of customization.
Mikuia — A Twitch bot that can keep track of song requests and sends updates about any rank changes or plays you set in the chat.
Ronnia — A alternative to Mikuia with a similar feature set
Mapping Tools — A huge compilation of tools to make mapping easier.
New Hitsound Copier — Another program to copy and paste hitsounds from one difficulty to another.
Osu! Storyboarder Banquet — A website dedicated to storyboarding
lua-mania — Converts osu!, osu!taiko, and osu!catch beatmaps to osu!mania.
Mania Hit Sounding Tools — Muliple tools for hitsounding osu!mania beatmap difficulties:
Magic Copy — A tool that copies hitsounds from one difficulty to another and works with default and custom hitsounds. Original concept from
osu!HitsoundManager.
Hit Object to Storyboard — Allows you to copy hitsounds and paste them into the storyboard.
Note Density calculator — Lists the distribution of keys in osu!mania difficulties.
Hitsound Detective — Checks for unused hitsounds in other difficulties (based on the selected difficulty).
Keysound Maker — Creates keysounds for osu!mania.
OMISM — An osu!mania to Stepmania beatmap converter (and an osu!mania keysound copier).
osu!HitsoundManager — A hitsounding tool for osu!mania that copies hitsound files and volume from hit objects to hit objects and storyboards. Originally named osu!MagiCopy.
Taiko Mod Generator — Storyboards osu!taiko to allow you to do interesting things with the Dons and Kats.
Storybrew — Easy to use Storyboard editor.
AIBat — An attempt to make modding easier for modders.
Mod Helper — A simple tool to help deal with BBCode when modding.
Osu Distance Checker — Lists out the various hit object distances to allow one to scan through potential spacing mistakes.
osu! skin mixer — A program that allows you to easily mix elements from other skins already in your skins folders
Beatmap Version Checker — Scans through for outdated unranked beatmaps and automatically (or manually) update them.
OSU Beatmap downloader — A tool to easily download beatmaps from the bloodcat mirror, featuring an in-game interface.
osu!grab — Improvements to browser beatmap downloading.
osu!cleaner — Allows you to automatically filter your beatmaps using various filters. Beatmaps that don't match any filters will be moved to a
Cleanup folder, where they can later be removed or moved back.
Osu!Shrinker — Deletes extra files included with beatmaps. A tool for those who play without storyboards or a black background.
osu!Sync — An open-sourced application that lets you export, share, and backup your beatmaps.
Osu!unZip — Unzip large amounts of
.osz files.
osu!vd — Batch script to delete beatmap videos.
Beatconnect — A mirror site for downloading osu! beatmaps.
Chimu.moe — A beatmap mirror and the successor to BloodCat.
Sayobot — A Chinese beatmap mirror.
ezpp! — A browser extension for calculating pp.
osu!Post — Live osu! status for your signatures.
osuplus — A script that adds additional features to the website.
See also: Internet Relay Chat
chat4osu! — A chat client for referees and casual chatters.
irc4osu! — A cross-platform IRC client for osu!.
Osekai — An open-source project dedicated to making websites highly related to osu!, such as
medal unlock requirements listing or alternative ranking leaderboards.
osu! Stats Watcher — Write player stats into a file, which can then be displayed using Open Broadcaster Software.
osu!chan — Hosts a multitude of alternative ranking leaderboards.
osu!Skills — Expands pp into include other metrics such as stamina, reaction, and memory.
osu!Stats — Search scores and player statistics.
osu!track — A tool that allows players to track their progress in-game and see visually see their improvement over time.
osu-pps — A website that lists the most overweight maps in terms of
pp by using a calculation system similar to
ppv1, and sorts mappers by how many overweight maps they have or how many high-quality beatmaps they have according to other mappers' favourites.
pupper.moe — Originally a spreadsheet, now a website for opt-in US state ranking leaderboards for osu! with some states' Discord servers being listed.
RTPP Displayer — Calculates and displays earned pp while playing on the fly.
Aiess — Provides subscriptions for mapping-related events in osu! (e.g. ranks, qualifications, nominations, suggestions, news posts, group changes, etc).
hwchr's pick'em — A site which hosts pickems for osu! tournaments with the option to request a pickem for a tournament.
o!subscribe — A service that allows you to subscribe to your favorite creators using Discord.
osu! BBCode Editor — A site which hosts a BBCode editor with realtime preview, designed for osu! userpages.
osu! matchmaking — quick and automated multiplayer matches
osu!APIlib — A simple library to interface with the osu!api.
osu!AR10 — A tool to convert any beatmap to AR10 for practising purposes.
osu!Elements — An open source .NET framework for osu! applications.
osu!player — A media player just for osu! beatmaps.
osu!trace — A cursor tracing program. Can be used for comparisons, show how a beatmap flows, etc.
osu-trainer — A program that allows you to modify the difficulty settings of a beatmap easily.
osuStuff — A website for creating anime-themed avatars, and playing automatic osu! Battle Royale tournaments.
Script chan — Referee tool to create and manage osu! rooms.
stats.circleclickers — View realtime stats about the usercount in osu!.