The Choral Public Domain Library:The primary purpose of the Choral Public Domain Library (CPDL) is to create a repository of editions of music in the public domain.
Arenai Vocal Ensemble Scores Database: Free critical editions of many French and Latin choral works of the Renaissance.
Bank of Scores: Free scores for choirs: Brazilian Music, Classic, Sacro Folk, Negro Spiritual, Spiritism Music, and Gospel.
Cantiga e-musicales: Many choral editions offered in PDF format. A dozen of these scores are free. Mostly Italian, German & French words.
ChoirWorks.com: Free choral music for LDS / Christian church choirs in PDF form. Free practice MP3s available for most titles.
Choral & Handbell Music: The published and unpublished choral and handbell music of Ralph R. Prime. Free copies and tapes available.
Choral Sheet Music Download Sites: Links to downloadable sheet music, provided by Festival Singers, New Zealand.
Coppini Edition: Free scores of madrigals from Monteverdi, Giovanelli, Banchieri.
EarHeadMusic: Original choral scores and new arrangements for children's and treble choirs (SA, SSA, SSAA); PDF's available for download upon purchase.
GMD - Music Archive: Sheet Music: Lots of Choral Sheet music here, as well as other scores.
Kantoreiarchiv: Free sheet music for choir, strings, brass, recorder, organ. Cantatas, motets, and masses. Full scores and parts. Site in German and English.
La mia Musica - My Music: Free choral music sheet collection. Many hymns, some other works. Most are in Italian.
MusicaNet Choral Music: Database of the choral music repertoire of the world. +83,000 titles of choral music in Musica International. Musica International coordinates the work of choral music federations, music libraries and choral music publishers.
RoDeby Music: Free sheet music for church use, including a choral selection.
ShareSong.org: Download Christian sheet music, MP3s, chord charts, MIDI, and lyrics for free.
Sheet Music: Free choral sheet music from the University of Alicante.
The Choral Music Archive: Searchable index for mixed choral music, a cappella or with accompaniment. Part of Musica Viva.