Frank Smitha's Macrohistory site is a sprawling hand-built world-history project whose century timelines, maps and essays became a long-lived reference for teachers, students and other websites.
The old Trenches on the Web casualty table became a widely cited quick reference for World War I mobilization, deaths, wounds and missing or captured troops, while also showing why historical totals need context.
The German Daemonen site assembled entries on supernatural figures from Greek myth, European folklore, South Asian traditions and occult literature into a dense old-web reference work.
Owen Williamson's University of Texas at El Paso Master List of Logical Fallacies grew into a widely cited teaching reference for recognizing deceptive, irrelevant and emotionally loaded arguments.