Purdue’s OWL (Online Writing Lab)
http://owl.english.purdue.edu/index.html

Chicago Manual of Style
http://http://www.press.uchicago.edu/Misc/Chicago/cmosfaq/cmosfaq.html

Daily Grammar
http://http://www.dailygrammar.com

Linguistic Fun Page
http://www.ojohaven.com/fun/

Logophilia: A Web Site for Word Lovers
http://http://www.wordspy.com/index.asp

APA Style Crib Sheet
http://http://www.wooster.edu/psychology/apa-crib.html