This site dissects Anne's life and diary with astounding thoroughness.
http://www.geocities.com/afdiary/index.html
There is plenty of information on the history of the diary, including the missing excerpts and name changes of various editions. Plus, there's plenty of information on Anne, a family tree of the Franks, and links for further information.
This is a good biography of Anne Frank that is simply written and easy to follow.
http://members.ozemail.com.au/~mghslib/projects/stwh05.html
The authors supplement the story with quotes from Anne's stories and information on Otto Frank after the war.
The St. Petersburg Times did a series on Anne Frank entitled "Lessons in Human Rights and Dignity."
http://www.sptimes.com/nie/nieanne.html
This site takes you to all the articles they did on Anne Frank. It includes a biography and photographs.
A language arts teacher created this site for students in grades 7-9.
http://members.tripod.com/BKoch_2/annefrank/
It has lots of projects, ideas, and links. Great for anyone who is interested in going in depth or wants to quiz themselves before a major test or essay on the book.