Fonetiks.org: An online language laboratory offering a phonologically complete guide to the pronunciation of seven varieties of English and other foreign languages.
IPA (The International Phonetic Association): International phonetic alphabet. Also links and information about phonetics. Phonetic Fonts for Windows and Macintosh.
Phonetics Focus: Cambridge English Online resources to help you improve your pronunciation and knowledge of phonetics in English. Illustrated flashcard maker. English idioms ewxercises.
Stuff Media Interactive Education: Phonetic Calculator. Learn the sound and characters of the international phonetic alphabet with this amusing software.
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.