This website is great for families. I linked the Internet Safety page so that you could get an idea of how direct they are in what they are doing. Check out the main page to find ratings on movies, games, music and more.
This is the most complete website out there when it comes to online safety. It's both intense and massive so be prepared to spend a few hours here.
Netsmartz.org is a great website dedicated to informing online users about how to navigate through the world wide web safely.