Hymnary.org, a comprehensive index of hymns and hymnals sponsored by Christian Classics Ethereal Library, Calvin Institute of Christian Worship, Calvin College, the Hymn Society in the United States and Canada, and the National Endowment for the Humanities
The Hymn Tune Index database contains all hymn tunes printed anywhere in the world with English-language texts up to 1820, and their publication history up to that date, created by world-renowned hymnologist Nicholas Temperley and sponsored by the University of Illinois, Urbana-Champaign.
The Hymn Society in the United States and Canada, which sponsors conferences and publications.
The Hymn Society of Great Britain and Ireland, which sponsors conferences and publications.
Songs of the Victorians, an archive designed and developed by Joanna Swafford, containing parlor and art songs of Victorian poems, and which served as a model for my own website.