Dave's ESL Cafe
http://www.eslcafe.com
Gathers resources scattered around the World Wide Web for English as a Second Language - look for his "Web Guide." Contains links for both students and teachers. There's also chat, discussion forums on a variety of topics, a job center for teaching ESL, as well as other stuff.
English as a Second Language Home Page
http://www.rong-chang.com
A starting point for ESL learners who want to learn English through the World Wide Web, providing links to good and free sites.
English Exercises Online
http://www.smic.be/smic5022
This site provides online and worksheet activities for British English. It includes grammar, vocabulary, reading comprehension and more.
ERIC
http://ericir.syr.edu/Eric/
Linguistic Funland TESL Page
http://www.linguistic-funland.com/tesl.html
Look for "Neteach-L Cool Sites" to find recommended sites on the World Wide Web. Sites are organized into a list of categories.
National Clearinghouse for ESL Literacy Education
http://www.cal.org/ncle
Focuses on literacy education for adults learning English as a Second Language. Contains fulltext of ERIC Digests - concise articles relevant to adult ESL literacy instruction - as well as information on other Clearinghouse materials and "Other Sites Worth a Visit" on the World Wide Web.
TOEFL Online
http://www.toefl.org
The official Web site for Test of English as a Foreign Language programs and services.