Encyclopedias

• International Standard Bible Encyclopedia
• New Schaff-Herzog Encyclopedia of Religious Knowledge 
• The Catholic Encyclopedia 
• World Wide Encyclopedia of Christianity 
• The Ecole Initiative: Hypertext Encyclopedia of Early Church History 
• Online Reference Book for Medieval Studies (ORB): Encyclopedia 
• Encyclopedia Mythica: [mythology] 
• Internet Encyclopedia of Philosophy 
• Stanford Encyclopedia of Philosophy 
• Jewish Encyclopedia

Dictionaries & Glossaries

• Glossary for the Study of Judaism, Christianity, and Islam
• Language Dictionaries and Translators 
• Postmodern Bible Dictionary 
• Dictionary of Theology 
• Biographical Dictionary
• Holman Bible Dictionary
• Baker's Evangelical Dictionary of Biblical Theology

 Judaica Resources

• The Use of Scripture in Early Judaism and the New Testament
• Second Temple Synagogues
  
• Jewish Encyclopedia