Lalemant Polyphonic could be called a mini-portal since it features several Web sites in additions to other resources on polyphonic chant:
Rare Books: Saint Jean de Lalande Library of Rare Liturgical Books (PDF)
Tribute: A Tribute to the eight holy Jesusit Martyrs of North America
Quis Non Amantem: A new CD & DVD with Sacred Polyphony & Gregorian chant
Gregorian Chant: Saint Isaac Jogues free Gregorian chant Resources (Mp3 & PDF)
Mass Parts: Saint Antoine Daniel Mass Parts (Mp3 & PDF) Kyrie, Gloria, Alleluis, ect.
Miscellaneous: 1962 Missel Requiem Mass Practice mp3,s & much more