Bartleby reference
Bartleby provides searchable access to a range of older and off-copyright reference sources including the 1918 edition of Gray’s anatomy. Nice source of period clip art for PowerPoints, and nice drawings for handouts. Thumbnails lead to larger images, usually 500 to 700 pixels wide, in pastel shading for (e.g.) veins and arteries.
There is a range of more recent material but mainly US-centric. The World Factbook is the 2003 edition, and the entries can be listed by field (e.g. unemployment rate) as well as by country. You can get a list of approximate unemployment rates or a list of the median age of the population for each of the several hundred countries available.