Language Exploration - - Basic concepts, definition of "ethnolinguistics." From Maricopa Community College.
Language Log - - Weblog run by University of Pennsylvania phonetician Mark Liberman, with multiple guest linguists.
Lexicon of Linguistics - - Searchable database of linguistic terminology updated with new terms in the areas of Generative Grammar (Minimalism) and Phonetics. Includes bibliography.
Linguasphere - - An exploration of linguistics and related resources with extracts from the Linguasphere Register of the world languages and speech communities.
The Linguistics Project - - Interdisciplinary, international, internet-community on language and linguistics.
Maledicta Press - - Specializes in negatively-valued words and expressions from all languages and cultures, focussing on the origin, etymology, meaning, use and influence of verbal aggression and abuse of any kind.
Museum of Human Language - - Virtual museum with columns. Definition of a language, linguistics, and language function.
The sci.lang FAQ - - Answers to frequently asked questions about dialects, languages and their relationships, linguistics, and phonetic systems.
Stewardship Project - - Listings of international geographical names, orthography and transcription with commentaries on language.
Unilang Community - - Provides a home for everybody interested in any aspect of language(s) or linguistics.