Flashcard Exchange

http://www.flashcardexchange.com/
free registration necessary; use pre-made flashcards or create your own slide show of flashcards, with definitions on the back side (flip); then create memory exercises/games, print, and/or download (export) them; available for several languages.

Flashcard Maker

http://www.americangirl.com/agmg/school_smarts/cgi/flash.cgi?op=create
create sets of up to 50 flash cards; save your set of cards for 30 days on this site.

Word-based Games for ESL Students

http://www.manythings.org/wbg/
matching, speed, jig-saw exercises with prefixes, homonyms, opposites, irregular plurals/verbs, word forms (v,n), suffixes, and more; see also the larger site for

vocabulary
English Vocabulary Word Lists with Games, Puzzles, and Quizzes http://www.manythings.org/vocabulary

Super Kids Vocabulary Builders

http://www.superkids.com/aweb/tools/words/wod.shtml
By grade level
Grammar, Vocabulary, and Culture Quizzeshttp://www.isabelperez.com/grammar.htm
grammar explanations and interactive exercises in HotPotatoes, especially for lower proficiencies (beginner, low intermediate, intermediate), by Isabel Pérez Torres (and others)

University of Victoria English Language Centre Study

http://web2.uvcs.uvic.ca/elc/studyzone/index.htm
vocabulary/matching exercises for beginners (in Hot Potatoes)

The ESL Study Hall

(By Christine Meloni)

VOCABULARY 

http://home.gwu.edu/~meloni/eslstudyhall/shvocabulary.htm
nabs; (Flags and Countries Quiz, Word Drop and Quiz Wiz)

English2U

http://www.ajarn.com/Education/Resources/english2u.htm
Free English vocabulary email lessons for busy non-native speakers who have studied English for several years.

Internet Bumper Stickers

http://www.directtodave.com/ibs/index.htm
See if you can figure out what Americans mean. Bumper stickers are very popular. Americans sticks them on their cars or at the end of a message. This is a great exercise in figurative language.

Common American Slang

http://www.aitech.ac.jp/~itesls/slang/  
Food Vocabulary Activity <http://www.etanewsletter.com/food-act.shtml> -- It offers colorful graphics of individual food items and instructions for various ways to use them as teaching supple.

Schoolhouse Technologies

http://www.iearn.org/
Word Search Factory is designed to help you quickly and easily create professional looking word search puzzles to provide your students with the extra vocabulary and spelling practice they need in a format that they find very enjoyable

Vocabulary University

http://www.vocabulary.com/schoolcal2002.html
A free site that allows students at high-elem., junior high and high school levels, teachers and life-long learners to acquire and retain vocabulary. Each free session has three levels. Each level has 3 puzzles with 12 words each (36 total words in a session) and contains seven (7) additional activities/exercises that help develop vocabulary. It is continuously updated.

Phrase fun

http://www.coolquiz.com/quizzes/phrases/
Here's a fun quiz to test your knowledge of popular English phrases and idioms. Each phrase is missing one word. Just click on the missing word. If you miss 5 phrases, the game is over! How many points can you score?

Webopedia

http://www.webopedia.com
Online dictionary and search engine for computer and Internet technology