Includes a huge variety of texts and translations.

Locate individual crusaders

The Revised Regesta Regni Hierosolymitani Database

Includes translations, annotations, and bibliography.

The French Outre-Mer Project (Fordham)

The French of Outremer Project (Fordham University)

The Prosopography of the Byzantine world.

Includes information on seals, and a deep list of sources, with related bibliography, and other materials.