Dave's ESL Cafe: Best overall ESL site from jobs, activities, educational links, and so much more.  www.eslcafe.com

 

Educational Testing Service: ets.org's useful page to help with the all important TOEFL exam.  http://www.ets.org/toefl

 

Voice Of America: Excellent site that teaches American English through audio and video.  They have different ability levels and categories.  http://learningenglish.voanews.com/