Dave VE7CNV'S Truly Canadian Dictionary of Canadian spelling: Information about Canadian English and a dictionary of Canadian spelling in alphabetical order.
TELSUR PROJECT: A survey of linguistic changes in progress in North American English. The Telsur Project of the Linguistics Laboratory, University of Pennsylvania is supported by the National Science Foundation and the National Endowment for the Humanities.
The Alternative Dictionaries: slang, profanities, insults and vulgarisms from all the world.
A collection of various forms of "bad language" from many languages. About 2743 entries in 162 dictionaries.