American Choral Directors Association
PSALM: Pan-Orthodox Society for the Advancement of Liturgical Music (Facebook)
ISOCM – The International Society for Orthodox Church Music
The Department of Sacred Music of the Antiochian Orthodox Christian Archdiocese of North America
http://ww1.antiochian.org/music/library
Orthodox Church in America Liturgical Music & Texts
Saint Romanos the Melodist Society