• http://www.merriam-webster.com/

The reference dictionary of US English

• http://www.gutenberg.org/                                                    

Thousands of free classical books to download

• http://www.urbandictionary.com/

A dictionary of Slang (US)

• http://www.peevish.co.uk/slang/index.htm

A other dictionary of Slang (UK)

• http://www.askoxford.com/

Excellent site for English student and all people who are passionate about language

• http://www.bbc.co.uk/worldservice/learningenglish/index.shtml

The Learn English section of BBC

• http://esl.about.com/

English as 2nd Language Web Site; lots of tips and free tests

• http://www.english-test.net/

Free English tests

• http://www.thefreedictionary.com/

Free dictionaries

• http://wordweb.info/

Free version of WordWeb dictionary. It's a convenient way to look up definitions of words from any computer program.

• http://www.soundsofenglish.org/

English pronunciation

• http://www.effingpot.com/index.shtml

Over 1000 words and expressions that differ in their usage between the US and the UK

• http://www.worldwidewords.org/index.htm

A paradise for word lovers.

• http://web.ku.edu/idea/index.htm

Samples of different English accents

• http://en.wikisource.org/wiki/Main_Page

English language library

• http://www.script-o-rama.com/movie-transcripts-a.html

Movie transcripts

• http://www.bartleby.com/

English reference texts

• http://www.bartleby.com/64/

The American Heritage Book of English Usage

• http://www.exampleessays.com/

Collection of essays

• http://www.americanrhetoric.com/newtop100speeches.htm

Audio files of famous speeches

• http://www.abc.net.au/rn/tranlist.htm

Transcripts of ABC Radio podcasts