http://www.faceweb.okanagan.bc.ca/pron/
English Pronunciation
This website offers examples of English pronunciation, including sounds that may be difficult for speakers of other languages.

http://esl.about.com/homework/esl/cs/pronunciation/
Pronunciation
This website features many links to websites about pronunciation, particularly useful for speakers of other languages.

http://www.m-w.com/help/pronguide.htm
Merriam-Webster Pronunciation Guide
This is a detailed explanation of pronunciation of English words, and the article provides a pronunciation legend that is used in the online dictionary.

http://www.bartleby.com/61/12.html
The American Heritage Dictionary of the English Language Pronunciation Key
This is the pronunciation key for the online dictionary.