Blue Book of Grammar and punctuation
- Grammar and punctuation reference guide including exercises with answers.
- http://www.grammarbook.com/

English for Techies
- By Christian Lassure, associate professor of English. For French student technologists. Grammar, false friends, translation methods, glossaries. Mechanical production engineering, industrial computing, and computer graphics.
- http://www.english-for-techies.net/

E-texts with Dictionary link
- A collection of e-texts where every word is linked to a dictionary for vocabulary improvement.
- http://www.thefreelibrary.com

free ESL Mailing List
- Free daily email. Increase your English learning skills and improve your English at the same time. Get expert help from teachers and language learners from around the world.
- http://www.esl.com.ua

Word Surfing
- A guide to ESL learners on the use of individual vocabulary development strategies using a well organised notebook. The method aims to encourage language learners to make the best possible independent use of all other available resources.
- http://www.wordsurfing.co.uk

Canada-ESL.com
- Free English activities and ideas on how to improve your English and free info about studying English in Canada.
- http://www.canada-esl.com

Learn English Today
- Free grammar and vocabulary section, idioms, exercises and links to news articles and recommended books.
- http://www.learn-english-today.com

Professor Grammar
- Includes games and a video grammar lesson. Requires RealAudio.
- http://www.professorgrammar.com/

LearnEnglish.be
- Aimed at the beginner and intermediate student. Includes grammar and vocabulary sections with additional exercises for practice.
- http://www.learnenglish.be

Apostrophe Protection Society
- Illustrates the correct use of the apostrophe in spelling the plural and possessive. Gives examples of misuse and the rules and examples for correct use.
- http://www.apostrophe.fsnet.co.uk/index.htm

International EFL Cafe
- Offers articles, information, and vocabulary tests.
- http://internationaleflcafe.com/

English Bites
- TV show focused on improving English language skills.
- http://abcasiapacific.com/englishbites

English Quizzes
- Interactive, illustrated vocabulary and grammar exercises, rated according to difficulty.
- http://www.prof2000.pt/users/tereza_n/

Sheppard Software - Free Vocabulary Web Games
- Different vocabulary quiz activities covering over 2,000 words include SAT / GRE and other terminology.
- http://www.sheppardsoftware.com/web_games_vocab.htm

Vocabulary Power
- Offers explanations and exercises for homophones, phrasal verbs, and idioms. Reading texts and TOEFL practice are also available.
- http://www.edumatic.qc.ca/English/activities/vocabularypower.htm

Word Power
- Offers phonics lessons, nursery rhymes, tongue twisters and Irish blessings for vocabulary practice. Oriented toward children with some exercises for adults.
- http://www.wordpower.ws/

Language Games
- Word search, crossword puzzles and hangman games for learning basic vocabulary. Games for learning other languages also.
- http://www.languagegames.org/

Common Errors in English
- Alphabetical listing of many words which are often used incorrectly. Includes explanations and examples.
- http://www.wsu.edu/~brians/errors/errors.html

The Internet Grammar of English
- Course written primarily for university undergraduates but useful for anyone as it doesn't presume any prior knowledge of grammar. Free for students who log in from a UK university and all explanations are free.
- http://www.ucl.ac.uk/internet-grammar/home.htm

God Save the Subjunctive
- Defines the subjunctive mood and gives links to more information, including example usage.
- http://www.ceafinney.com/subjunctive/index.html

Cats Family Grammar
- Offers grammar explanations in English, German and Russian.
- http://www.cats-family.com/grammar/english/english/index.shtml

English Page
- Offers free grammar and vocabulary exercises, topical tutorials, reading exercises, dictionaries, and other resources for intermediate and advanced learners.
- http://www.englishpage.com/

Indiana State University Grammar
- Includes information on irregular verbs, modals, plurals, prepositions, tense and aspect, two-word verbs, and article usage.
- http://isu.indstate.edu/writing/esl/esl.html

Grammar Online
- Offers printable grammar lessons including explanations, exercises, and answers.
- http://online.ohlone.cc.ca.us/~mlieu/