Historical Maps:
- Euratlas Maps (historical maps of Europe)
http://www.euratlas.net/history/europe/index.html - Talessman Atlas of World History:
http://www.worldhistorymaps.info/maps.html - WHKMLA Historical Maps:
http://www.zum.de/whkmla/histatlas/haindex.html - David Rumsey Map Collection (historical maps)
http://www.davidrumsey.com - Historical maps of the Habsburg Empire
http://mapire.eu/en/ - Maps of South Asia by Frances W. Pritchett (Columbia University)
http://www.columbia.edu/itc/mealac/pritchett/00maplinks/index.html - Historical maps by Frank Smitha
http://www.fsmitha.com/maps.html - Britannia History (historical maps of Britain)
http://www.britannia.com/history/histmaps.html - New York Public Library Map Collection (historical maps)
http://maps.nypl.org/warper/ - Cornell University Library Persuasive Maps Collection (historical propaganda maps)
https://persuasivemaps.library.cornell.edu/ - Old Maps Online Portal
http://www.oldmapsonline.org/
Contemporary Maps:
- Electoral Geography 2.0 (electoral maps)
http://www.electoralgeography.com/new/en/ - Gulf 2000 Maps (the Greater Middle East, also some historical maps)
http://gulf2000.columbia.edu/maps.shtml - Ethnologue, Language maps:
http://www.ethnologue.com - Perry-Castañeda Library Map Collection (also historical maps)
http://www.lib.utexas.edu/maps - The Big Map Blog
http://www.bigmapblog.com/ - Steve Huffman Language Maps
http://www.worldgeodatasets.com/language/huffman/?pathinfo=wlms/users/huffman/ - Eupedia’s Maps of Europe (legal, socio-economic, cultural & genetic maps)
http://www.eupedia.com/europe/maps_of_europe.shtml - Free Base Maps from d-maps.com
http://d-maps.com/