Carleton College, Medieval and Renaissance Studies Primary Sources. Great stuff, and longer selections, which make more sense than dozens of 1-paragraph readings (though those are useful too).
“Chinese Culture,” the richly detailed syllabus and course resources for Paul Halsall’s 1996-9 course at Brooklyn College. Thanks for keeping this page up!
A resource everyone knows about, but that seems to be constantly underestimated: The Avalon Project at Yale. Any project that has digitized a huge chunk of the Nuremberg War Crimes Trial papers should receive accolades.
Donald J. Mabry’s Historical Text Archives, which aren’t always easy to navigate, but which have a lot of very useful, otherwise obscure sources and historical essays.
And, last but definitely not least, Europeana 1914-1918. This is a superbly designed site where you can search or browse for a bewildering variety sources and materials on the First World War. You’re welcome. Happy browsing.