Writing

The American Heritage Dictionary of the English Language
An excellent basic dictionary with 90,000 definitions and 900 color illustrations.

AskOxford.com
Frequently asked questions about language, grammar and usage.

The Core Rules of Netiquette
Ten rules offering no-nonsense advice from Virginia Shea, the author of the book Netiquette.

The Elements of Style
Classic guide to English composition and usage.

Guide to Grammar and Writing
Sharpen your writing skills with this online guide to grammar and writing at the sentence, paragraph, and essay and research paper levels.

Research Strategies
An online textbook to help you " find your way through the information fog."

Writer's Handbook
From the University of Wisconsin. Includes academic writing, letter writing, and grammar and style.