Filtering software
Safe Eyes - filtering and accountability software - the best stuff out there!  

Other Online Resources
XXXChurch - online forum, books, events, and other great resources on porn addiction
ThePornTalk - great site about how and when to talk to your kids about porn

Books
"The Game Plan" by Joe Dallas
"Wild at Heart" by Jon Eldredge
"Every Man's Battle" by Stephen Arterburn and Fred Stoeker