Here are a few:
http://www.scholarsfortruth911.org/
http://911blogger.com/
http://www.reopen911.org/
http://www.geocities.com/killtown/
http://www.standdown.net/
http://www.911truth.org/
http://thewebfairy.com/killtown/911links.html
http://www.tvnewslies.org
http://www.prisonplanet.com/911.html
http://stopthelie.com/home.html
http://www.911proof.com/
http://georgewashington.blogspot.com/
http://www.whatreallyhappened.com
http://911research.wtc7.net/
http://www.PatriotsQuestion911.com
http://www.legitgov.org/index.html#breaking_news
http://ae911truth.org/