English Town

Free Online Pronuncition Guides with Instant Sound
http://www.fonetiks.org/

The Internet TESL Journal
http://iteslj.org/

Interesting Things for ESL/EFL Students
http://www.manythings.org/

BBC Learning English
http://www.bbclearningenglish.com
Pronunciation Tips @ BBC Learning English
http://www.bbc.co.uk/worldservice/learningenglish/grammar/pron/sounds/

American English Pronunciation Practice (For ESL/EFL)
http://www.manythings.org/pp/

Authentic American Pronunciation
http://eleaston.com/pr/home.html

Phonetics: The sounds of American English @ The University of Iowa
http://www.uiowa.edu/~acadtech/phonetics/english/frameset.html

Merriam-Webster
http://www.m-w.com

Randall’s ESL Cyber Listening Lab - For ESL/EFL Students
http://www.esl-lab.com/