Interactive atlas of US history from the Digital Scholarship Lab at the University of Richmond.

This web-based mapping tool allows you to make maps of Europe, the Mediterranean Basin, North Africa, and the Near East. It covers 750 BCE to 600 CE. You can save and print your map as a PDF or save it as a KML for use with Google Earth.

Very comprehensive and complete list of annotated links to historical maps. It currently has over 2,500 links, and it is updated monthly

The historical map collection has over 34,000 maps and images online. The collection focuses on rare 18th and 19th century North American and South American maps and other cartographic materials. Historic maps of the World, Europe, Asia, and Africa are also represented.

This geoportal combines the David Rumsey Map Collection, A Vistion of Britain through Time from the University of Portsmouth, the map collection of the Czech Republic's Moravian Library, The British Library's map collection, and the National Library of Scotland's Maps of Scotland.

Over 100,000 historical topographic maps covering the last 125 years from the U.S. Geological Survey are available for download here.

Maps of the Ancient and Classical World which can be freely used for educational purposes under a Creative Commons license.

A range of historical maps from the United States Geological Survey and other government agencies.

Pleiades is a historical gazetteer that gives scholars, students and enthusiasts worldwide the ability to use, create, share, and map historical geographic information about the ancient world. It associates names and locations in time and provides structured information about the quality and provenance of these entities.