Sacred Scriptures
- Online Bibles
- BibleGateway.com (many versions of the Bible)
- New American Bible – Revised Edition (NABRE from USCCB, online)
- Revised Standard Edition (RSV, online)
- Bible Hub – includes many versions, plus interlinear Hebrew and Greek, Strong’s, etc.
- The Step Bible – includes many versions, plus interlinear Hebrew and Greek, Strong’s, etc.
- Greek Septuagint
- Research Tools
- Haydock Commentary on the Bible Online
- Patristic Bible Commentary
- McClintock and Strong Biblical Cyclopedia Online
- The Treasury of Scripture Knowledge
- Blue Letter Bible Search (includes LXX and Vulgate)
- Verbum Catholic Bible Study (Android App) or here (iPhone App)
- Scriptural Index to the Catechism of the Catholic Church
- Lexicons and Concordances
- A Pocket Lexicon of the Greek New Testament
- A Greek-English Lexicon (Liddell, Scott and Jones)
- Insights
- The Senses of Sacred Scripture– Catechism of the Catholic Church or here to listen to an 8 minute podcast on the same topic.
- Reconstructed Dialogue in the Bible – Jimmy Akin
- Science and the Old Testament – from the Fathers and the Magisterium
- The Bible Alone? Part I and Part 2
- Handling Bible Difficulties
Saints and Church Fathers
- St. Thomas Aquinas
- Summa Theologiae by St. Thomas Aquinas
- The Catechetical Instructions of St. Thomas Aquinas (PDF) or “The Aquinas Catechism” from Amazon.
- Catena Aurea, St. Thomas Aquinas
- The Apostolic, Ante-Nicene, Nicene, and Post-Nicene Fathers
- Fathers of the Church Online (Christian Classics Ethereal Library)
- Ante-Nicene Fathers
- Nicene and Post-Nicene Fathers
- Apps
- Catena app for Android phones
- Catena app for iPhones
- Catholic Church Fathers Android app for audio recordings of many homilies
Catechisms and Dogmatic Resources
- Roman Catechism
- Catechism of the Council of Trent (online)
- Catechism of the Council of Trent (Roman Catechism) (PDF. Good, with scriptural references, but no Table of Contents)
- Catechism of the Council of Trent (Roman Catechism) or here (PDF. Includes a Table of Contents, but no references to the Scriptural verses cited)
- Catechism of the Council of Trent (Roman Catechism) (Kindle format from Amazon)
- The Catechism of the Council of Trent, Translated Into English, with Notes by Theodore Alois Buckley (Online, with descriptive headers.)
- The Catechism of the Council of Trent, or here, translated by Rev. J. Donovan (PDF, excellent scriptural citations in footnotes)
- Catechism of the Catholic Church
- Catechism of the Catholic Church (Holy See online)
- Catechism of the Catholic Church (USCCB online)