Classics in the History of Psychology: Many full texts available online

The James Lind Library: Documents the evolution of fair tests of medical treatments, with examples from various books and journal articles. Also biographical material, portraits, translations, and commentaries

The Terrible Transformation: Numerous articles tracing the origins of American slavery from the European incursion into Africa to mid 18th century America, maps, timelines, and illustrations

Virtual Religion Index: Large link collection from Rutgers University, categorised by religion. Also includes resources for ancient religions, archaeology, philosophy, sociology of religion, and psychology of religion