Main page: osu!
Based on Osu! Tatakae! Ouendan. Tap, slide, and spin to the beat.
Main page: osu!taiko
Based on Taiko no Tatsujin. Drum, and roll the taiko drumroll to the beat.
Main page: osu!catch
Loosely based on a minigame inside of a beatmania simulator, which was based on the EZ2CATCH mode from the EZ2DJ series. Collect falling fruits by moving the catcher with a plate. Keep dancing and do not miss the step of the beat!
Main page: osu!mania
Based on conveyor-type rhythm games, chiefly introduced and implemented by woc2006. Make the notes play a melody of the beat.