I know I have been pointing out French atlases but even if one cannot understand Formage Français one can easily understand maps.
Because of this I am pointing out a marvelous collection of thematic maps from La Documentation Française. This online atlas has a plethora of maps with everything from natural resources to migration to general world maps. The religious map of Lebanon and infant mortality in the United States are two great stand outs.
The great news with this site is that it is constantly updating so be sure to check up on it once and a while. (Hat Tip: Le Petit Blog Cartographique)