IPA - International Phonetic Alphabet chart, a world-wide notational standard for phonetic representation of all languages.
A Course in Phonetics by Peter Ladefoged - A complete HTML version of Peter Ladefoged's books on phonetics, vowels and consonants hosted by the UCLA Phonetics Laboratory Archive.
Randall's ESL Cyber Listening Lab - Digitized listening quizzes in easy, medium and hard levels with both long and short conversation exercises.
The Sounds of English - Pronunciation guides for American English, including diagrams of articulator placement for a variety of spoken vowel sounds and audio files to practice along with.
The English Listening Lounge - Streaming audio files of recorded conversations in English.
Modern Language Association Website - An association dedicated to the teaching and learning of modern languages, the MLA website contains information on language acquisition.
Using MLA Style - Guidelines for MLA Format, a set of guidelines concerning punctuation, quotation and documentation of sources for the preparation of scholarly works and student research papers.
TransGlobal Books - A helpful site for locating books, movies, music and language acquisition resources in various languages.
How Do You Say Thank You? - A resource hosted by ETailer's Digest offering "thank you" in a large variety of languages. They also have a "welcome" list in multiple languages.