Puzzles
Manythings.org
www.manythings.org is a fun study site for learners of English as a Second Language: Word games, puzzles, quizzes, exercises, slang, proverbs and much more
Diabetes Crossword
Here's an HTML crossword on diabetes. Click on it and it should download and open in your browser.
Discovery Education Puzzlemaker
The Discovery Education Puzzlemaker enables you to make a number of puzzles online. They also sell a version for use on your own computer.
Bogglesworld
Bogglesworld is a site geared for English teachers and provides useful tools and resources.