United Methodist General Board of Discipleship's Worship Page
Articles, resources and links.
Lift Up Your Hearts (Evangelical Lutheran Church in Canada)
A treasure trove of links along with other resources.
Creator Magazine Online
Website of the journal by & for church musicians.
Music in Worship
Newsletter from Selah Publishing Co.
The Ministry of Congregational Singing
Hymnwriter/songleader/preacher John Thornburg's work to help congregations
see "beyond the worship wars."
Choristers Guild
"Nuturing the Spiritual Growth of Children and Youth Through Music." Association of church musicians publishes music, curricula, and bimonthly journal; sponsors workshops, seminars, and scholarships.
The Hymn Society in the United States and Canada
Excellent book/hymnal service and quarterly journal.

The Order of St. Luke
Religious order dedicated to sacramental and liturgical scholarship, education, and practice.  Publishes original titles and reprints dedicated to worship, available through the website.
The Alban Institute
"Research based resources for congregations."  Publications available through the website.  **Every small church worship leader should read: Beyond the Worship Wars , Long; and One Bread, One Body , Hawn; both published by Alban**