The Magic of MIDI V1: Collection With 169,454 MIDI Files! : Modern XP - modernxp.neocities.org : Free Download, Borrow, and Streaming : Internet Archive
Classical Archives: MIDI
Piano MIDI files
IK Multimedia - iGrand Piano
12 Easy Classical Pieces (coll.1) sheet music for piano solo
7200 MIDI Piano Chord Files to Download - La Touche Musicale