Praise and Glory
- Includes research index for sources of this published sampler of "West Gallery" metrical psalm tunes used in England from 1740-1860.
- http://www.wgma.org.uk/PandG/index.htm

New Apostolic Hymnal
- Includes lyrics, MIDI files, and copious indexes.
- http://www.nak-gesangbuch.de/

Together in Song
- Online indexes for this "Australian Hymn Book II" provided by HarperCollins Religious.
- http://www.harpercollinsreligious.com.au/hymn_book/

Gilead Software
- [commercial electronic indexes] Sells Hymnastics, including indexes for hymnals used by churches of Christ: Sacred Selections for the Church, 1960; Great Songs of the Church #2, 1973; Hymns for the Family of God, 1976; Songs of the Church, 1977; Great Son
- http://www.gileadsoftware.com/

Visual Liturgy
- Includes index of hymns from "Hymns Ancient and Modern New Standard", "New English Hymnal", "Worship Songs Ancient and Modern."
- http://www.vislit.com/

Concordance to Hymnal: A Worship Book
- [Mennonite: sales as printed book or DOS program]
- http://www.mph.org/cp/hymnconcord.htm

Lutheran Hymnal MIDI Project
- MIDI files, topical indexes from The Lutheran Hymnal, Lutheran Book of Worship, Lutheran Worship
- http://www.lutheran-hymnal.com/