A site that allows creation and customization of current and historical maps, with options including the addition or removal of borders and labels, and coloring of map regions.
An interactive mapmaker from National Geographic, featuring a new version in beta that provides additional functionality via a collaboration with ESRI, maker of ArcGIS.
A digital version of a 1932 atlas with over 700 maps focusing on the United States through history. This version "georectifies" the print book's maps, superimposing them on current maps to give readers additional context.