General Reference

Comprehesive list of Canadian libraries. Browsable by institution name, library type, and region. Hosted by the National Library of Canada.

AMICUS is an information resource developed and maintained by the National Library of Canada (NLC) for libraries, researchers and the public.

Home to one of the largest "collections of collections" on the Internet, ibiblio.org is a conservancy of freely available information, including software, music, literature, art, history, science, politics, and cultural studies.

Description from Tech Radar
Even though printing out the whole of Wikipedia would result in a stack of paper about a kilometre high, it is somewhat exclusive in what it contains. If you're after outrageously detailed guides to popular culture, Wikia's various sub-sites will suck you in and never spit you back out. Take a look at Wookieepedia, the Star Wars wiki, for a perfect example: it features a whopping 70,000 articles, and all of them are obsessively maintained.

A massive online encyclopedia that anyone can update and edit.