English

American Psychological Association Style
http://www.apastyle.org
APA style advice and examples are available, plus links to the American Psychological Association home page.
Subjects:   Writing Resources  

Elements of Style
http://www.bartelby.com/141
The classic work by William Strunk. This 1999 edition is available in full-text online, and gives advice on the rules of usage of the English language.
Subjects:   Writing Resources  

Poets & Writers, Inc.
http://www.pw.org
Poets & Writers,Inc. is a resource for creative writers. It is an excellent source for writing workshops, grants and awards for writers. Other features include writing contests, publishing advice, and additional literary links.
Subjects:   Writing Resources