Manythings.org

Very interesting ad-free web site for people studying English as a Second or as a Foreign Language (ESL/ EFL) It provides learners with quizzes, word games, word puzzles, slang, pronunciation and listening practice and other computer assisted language learning activities (Flash, Java/ Javascript..., audio and video). It also offers external references to useful materials for teachers of ESL.

http://www.manythings.org/