Terra GIS

A Seattle based company specializing in web mapping, cartography and spatial analysis. It is also offering formation on implementing open source GIS solutions.

www.terragis.net

Radical Cartography

An interesting collection of online maps on various subjects.

www.radicalcartography.net

GeoBase

Pan-Canadian partnership between federal, provincial, territorial and local governements to provide free GIS data online.

www.geobase.ca/geobase/en/index.html

GeoGratis

Natural Resources Canada's free GIS data portal.

www.geogratis.ca/geogratis/en/index.html

GIS Data Depot

GeoCommunity's Free GIS data of many countries.

data.geocomm.com/catalog