Swarthmore College :: Linguistics

Linguist List: a well-organized moderated mailing list for linguists. Also a good source for job listings.
Voices: a definitive resource of organizations, programs and centers in linguistics.

Linguistic Society of America: the professional organization for linguists in the U.S. Has job listings.

SIL International: Linguistics in SIL focuses on researching undocumented minority languages, training field linguists, and providing resources to assist in linguistic data collection and analysis.
The Human Languages Page The Human-Languages Page is a comprehensive catalog of language-related Internet resources.
European Minority Languages: List of 'minoritized' languages in Europe and resources concerning these languages.
Ethnologue: Languages of the World.
Web of Online Dictionaries: An Index of On-Line Dictionaries.
Terralingua: Partnership for linguistics and biological diversity.
Aboriginal Languages of Australia: There are more than 200 Australian Indigenous languages, most of which have been destroyed; all the others are endangered. This web site has links to 104 resources for more than 30 of these languages.
Learning ASL: A site that offers courses in ASL interpretation.