The Gospels in Four Part Harmony
- Harmony based on MS Pepys 2498.
- http://www.gutenberg.org/etext/4319

Synoptic Gospel Outline
- Hypertext links to the RSV translation at Bible Gateway, with footnotes to the Catholic Catechism, word studies, and comments.
- http://landru.i-link-2.net/shnyves/matthew_mark_and_luke.htm

Gospel Dates, Gospel Authors, Gospels Freedoms
- A consideration of gospel authorship, publication dates, and historical reliability. By J. P. Holding.
- http://tektonics.org/ntdocdef/gospdefhub.html

Synoptic-L
- An academic list devoted to scholarly discussion of the Synoptic Gospels.
- http://groups.yahoo.com/group/synoptic-l/

Synoptic Gospel Primer
- An introduction to the "Synoptic Problem": questions and theories about the literary relationships among the gospels of Matthew, Mark, and Luke.
- http://virtualreligion.net/primer/

Harmony of the Gospels
- A historical study of the four gospels with verses of the gospels presented side by side in for the most part chronological order.
- http://www.dokimos.org/mmlj/

Synoptic Gospels: Harmony / Disharmony in the gospels.
- A consideration of this topic by James P. Dawson.
- http://www.jpdawson.com/synopt/synopgos.html

Principles Involved in Harmonizing the Synoptic Gospels
- The five main principles.
- http://www.xenos.org/essays/harmony.htm

The Case Against Q
- Studies in Markan Priority and the Synoptic Problem. By Mark Goodacre.
- http://www.ntgateway.com/Q/

The Life of Jesus in Harmony
- Outline of a harmony of the four gospels.
- http://www.bible-history.com/jesus/jesusAn_Outline_of_The_Life_of_Jesus.htm

The Five Gospels Parallels
- Gospel Parallels for Matthew, Mark, Luke, John, and Thomas.
- http://www.utoronto.ca/religion/synopsis/