Big Map Blog
A collection of historical maps at very large resolution. US only.
A personal online collection of strange and unusual maps.
Hipkiss' Scanned Old Maps
Scans of maps and charts from various historical books.
International Antiquarian Mapsellers Association
The IAMA's main purpose is to promote the professional trade of antiquarian, collectible maps and related books combined with promoting public interest, appreciation and education with respect to antiquarian maps.
International Map Collectors Society
London-based organization for those interested in maps, including collectors, dealers, librarians, and academics. Activities overview, events calendar, journal, library, and resources.
Tribe: Map Lovers
Forum and community for those who enjoy old maps, topographical maps, road maps, atlases, GIS, online mapping tools.