Classic Cat: Messiaen: Directory of mp3s on the internet that have been made available by their performing artists.
Classical Music Archives: Messiaen: Biography from the Concise Oxford Dictionary of Music.
Kunst der Fuge | Olivier Messiaen: Selection of quality MIDI files (no download limits).
Messiaen, Olivier (1908 - 1992), France: Biographical data, recommended CDs, books and sheet music, bibliography, and links to biographical essays.
Olivier Messiaen: Biography, bibliography, discography, list of works, gallery and links. Some previously unpublished material and photos.
Olivier Messiaen: Filmography at IMDb includes television production of his opera Saint François d'Assise.
Regards sur OLIVIER MESSIAEN: Biography, Timeline, Catalogue of Works, Discography, Links, Musical Language, Analysis of "Vingr Regards sur l'Enfant-Jesus". Most contents are in Japanese.