Free - 20,000 MIDI Music Files to Download: Over 20,000 searchable MIDI files, collected in ZIP files by genre. Includes folk, blues, jazz, pop, instrumental, showtime, and classical.
Furball MIDI Cannery: Oldies, rock, country, folk: seven hours of playing time.
Gav's MIDI Page: Large MIDI site sorted by genre.
Mawek's Midi Files Archive: Large collection of sound files.
Midi Creator: Large collection of compressed pop and rock MIDI files, sorted by artist.
The MIDI Madness: Quality MIDI files for download.