Hundreds of free English exercises. http://www.agendaweb.org

 Complete guide to phrasal verbs. http://www.phrasalverbdemon.com

 ELLLO stands for English Language Listening Lab Online. It is a collection of over 1,000 listening activites that students can view free via the internet. Most listening activites come with a downloadable MP3 audio file, transcript and interactive quiz. ELLLO offers a variety of listening activities that each target a specific listening skill, need or interest. http://www.elllo.org/english/home.htm

 http://www.bbc.co.uk/worldservice/learningenglish/

 Language Guide’s mission is to develop free resources for learning languages and promote cultural understanding. As computers and Internet connectivity continue to drop in price, the Internet has the potential to become an extraordinary platform for providing free, universally accessible education. http://www.languageguide.org/eng/ 

Interesting Things for ESL Students. A fun study site for learners of English as a Second Language.
Word games, puzzles, quizzes, exercises, slang, proverbs and much more. http://www.manythings.org/