Just the super famous ones to get it off my chest:
U.N. Owen was Her?
But to be honest, I prefer the EastNewSound remix over the original:
And there's also Bad Apple:
The rest of these songs are just ones I enjoy to play to on Osu, since I've never played any of the Touhou games. These are also probably remixes of the originals, since a lot of songs derives from Nico Nico Douga.
senya - Kasoku Suru Koi wa Dare mo Tomerarenai (Third Eye)
Comp - Touchuu Aika
FELT - Closed Wings