English Usage and Style Guides
Bartleby.com's English Usage section combines contemporary and classic usage guides to form the best full-text searchable resource on the web. Includes the full text of Elements of Style, Roget's Thesaurus, the American Heritage Dictionary, Bartlett's Quotations and more.
Guide to Grammar and Writing was created by Professor Charles Darling for English courses at Capital Community College in Hartford Connecticut and is one of the most popular sites of its kind.
Common Errors in English is dedicated to errors in usage (such as choosing between affect and effect, lie and lay). This is not a site dealing with grammar in general.
Encyclopedia of Logical Fallacies describes the known logical fallacies and offers an easy to use Google search. A fallacy is defined generally, as an error in reasoning. This differs from a factual error, which is simply an incorrect fact. On the other hand, a fallacy is an "argument" in which the premises given for the conclusion do not provide the needed degree of support. (See also Wikipedia on Logical Fallacies.)
Online Resources for Research Writers Online tools and tutorials for students in English 344 at Wright State University, this site was created by Dr. Martin Maner, professor of English, as a companion to his textbook, The Research Process.
The Purdue University Online Wring Lab offers more than 200 free resources including grammar, punctuation & spelling guides and style guides for both students and professionals.
The University of Texas Style Guide covers the basics using Associated Press Style, the guide used by most newspapers in the United States.
Bedford/St. Martin's Online: A Reference Guide to Using Internet Sources Citation Styles section explains how to cite Internet sources using MLA, APA, Chicago Style and others.