Dictionary.com - www.dictionary.com
Excellent online dictionary.
ESL.net - www.esl.net
ESL software for sale.
Grammar Untied (formerly The Tongue Untied - www.grammaruntied.com
A guide to grammar, punctuation, and style.
OWLwww.owl.english.purdue.edu
Online writing guide with directions on all kinds of writing from essays and term papers, to business letters and resumes/CVs; plus a good grammar guide.
A4ESL - www.a4esl.org
Excellent free interactive on line English quizzes.
Handouts Online - www.handoutsonline.com
Inexpensive service providing a variety of ESL handouts for use in class, plus other ESL resources for sale.
Internet TESL Journal - www.iteslj.org
Offers free lesson plans, articles and teaching tips.
ELT Forum - www.eltforum.com
Devoted exclusively to investigating challenging topics in English language teaching. Subscription needed to gain access to the best bits.
English Plus - Englishplus.com
Online grammar, spelling, and test preparation resources.
Free ESLwww.free-esl.com
Articles and useful grammar guide, plus job listings.
The Linguistic Funland - www.linguistic-funland.com
Resources for language teaching and learning, linguistics study, and other miscellaneous resources.
One Stop English - www.onestopenglish.com
An excellent site offering TEFL teacher support, including resources, articles, downloads, job listing, and more.
Peak English - www.peakenglish.com
Online English teaching and learning site. Teachers can offer their tutoring services online.
Say it in English - www.say-it-in-english.com
Free English and spelling lessons.
Self Access - www.selfaccess.com
Fee-based service offering an online library of interactive English lessons and test preparation exercises.