Bassoon: Fingering Charts — Finger Chart
Finger Chart is a free site with interactive fingering charts for flute, oboe, clarinet, bass clarinet, saxophone, bassoon, trumpet, horn, trombone, euphonium, baritone and tuba. Users select a note to see the fingering and hear it at concert pitch, and each chart can be printed as a PDF. It's aimed mainly at developing players and students learning secondary instruments.
Tenor Trombone: Instrument Studies for Eyes and Ears — Jacobs School of Music
Instrument Studies for Eyes and Ears, by Don Freund, site designed by Reid Merzbacher