Divine Digest - A quick reference guide to the major World Religions.
Spiritual Encyclopedia - Covering the most important topics for all spiritual traditions and paths on your way to god. Brief but comprehensive explanation of divine words and principles governing the creation.
Early Church Online Encyclopedia - Hypertext encyclopedia of the early Christian Church up to the Reformation.
Centennial Encyclopaedia of the African Methodist Episcopal Church - Compiled by Richard R. Wright, Jr. Reference work published in 1916.
Cyclopaedia of African Methodism - An encyclopedia of the African Methodist Episcopal Church, published in 1882.
Jewish Encyclopedia - Contains the complete contents of the 1906 Jewish Encyclopedia. Over 15,000 articles and pictures about the Torah, history, literature, biography, geography, genealogy, and theology. Accessible for free and full-text searchable.
Christian Cyclopedia - Electronic version of the one volume print resource from Concordia Publishing House of The Lutheran Church-Missouri Synod. Includes history, theology, and biographies from within Lutheranism, general Christianity, and non-Christian beliefs.
Global Anabaptist Mennonite Encyclopedia Online - Information on Anabaptist-related (Amish, Mennonite, Hutterite, Brethren in Christ) topics, source documents, and history.
Thelemapedia - Explore hundreds of topics in this open source encyclopedia dedicated to the religion of Thelema.
World Christian Database - Statistical information on world religions, Christian denominations, and people groups. Based on the 2600-page World Christian Encyclopedia and World Christian Trends. A full-time staff at The Center for the Study of Global Christianity updates and maintains the database. Limited access is free; paid access gets full set of features.
Ilumina - An interactive Bible and Encyclopedia Suite, from Tyndale House Publishers. Features computer animation and virtual-reality tours.
World Wide Encyclopedia of Christianity - Links to the contents of the Catholic Encyclopedia, Easton's Bible Dictionary, Torrey's Topical Textbook, Elwell's Dictionary of Christian Theology, and other sources.