Menlo-Atherton High School Library
Earth and Moon Viewer
Library of Congress - American Memory Map Collection
National Geographic Maps - Maps and atlas puzzles.
World Atlas.com - Maps and flags: includes currency conversion, current time, and a calculator for flight or driving distances.
World Mapper.org - World Mapper is a collection of world maps where territories are re-sized on each map according to the subject of interest. There are currently about 700 maps.