American Society of Church History: (for scholarly study of Christianity and American culture): Features organizational information, links, bulletin board.
Concordia Historical Institute: Department of Archives and History of the Lutheran Church--Missouri Synod: large archive of artifacts and information on American Lutheranism. Online catalog.
Divining America: Essays, teaching suggestions, and questions and answers for secondary school teachers teaching religious aspects of American history (from the National Humanities Center.)
Documenting the American South: The Church in the Southern Black Community.: Collection of e-texts and scholarly references.
Fire and Ice: Puritan History and Biography: Books and articles by and about notable Puritans.
Library of Congress: Religion and the Founding of the American Republic: Companion to exhibition, including overview of the topic, illustrated with items from the exhibit.
Oneida Community Collection in the Syracuse University Library: Collection of sources including links to online bibliographies, books, photos.
Proto-Pentecostal Time Line: Events that led to the birth of Pentecostalism.
Red White Blue & Brimstone: Online exhibit from the University of Virginia Library examines the Book of Revelation and millenarian thought in American culture.
Rev Elhanan Winchester, Patriot/Preacher: (Revolutionary War era) Sample writings: patriotic and religious.
Thomas Hooker: Biographical sketch; selections from "The Soul's Preparation for Christ" and "The Christian's Two Chief Lessons."
Timeline of U.S. Church History: Covers 1607 to 1989; includes some secular events and links.
United Methodist Church, General Commission on Archives and History: Official archives. Also includes suggestions for other church bodies studying or archiving historical data.