osugame topic
osu-winello
osu! stable installer for Linux with patched wine-osu and other nice features 8)
webosu
The unofficial osu! web port with a huge pool of beatmaps
JKPS
A keys-per-second meter for rhythm games, useful for streaming and making videos
osu-online
Unofficial osu! client in the browser
osu-stuff
Possibly first osu! modding framework with it's bright future.
osu-trigen
osu!trigen - realtime animated triangles in osu! style
osu-3ds
A (homebrew) port of osu! to the Nintendo 3DS.
osu-wiki
osu!wiki 中文翻译
kurarin
a simple osu! standard simulator
mappool-generator
A Mappool Generator for osu! Tournament Livestreams