PC Magazine FilterGuide
http://www.zdnet.com/pcmag/features/utilities99/parfilt01.html
How do you monitor and control what your child sees while surfing the
Internet? Web filtering software can help by protecting kids from sexually explicit Web pages and other questionable material. PC Magazine tested eight popular Web filtering packages to see how well they worked.
World Wide Web Consortium PICS Rating System FAQ
http://www.w3.org/PICS/PICS-FAQ-980126.html
Just the facts, please, about the Platform for Internet Content Selection (PICS), which is a set of technical specifications that facilitate user/recipient-centered controls on Internet content, rather than sender-centered controls.
SafeSurf
http://www.safesurf.com/
Working to make the Internet safe for kids, SafeSurf has developed and is implementing an Internet Rating Standard that brings together parents, providers, publishers, developers, and all the resources available on the Internet.
World Village
http://www.worldvillage.com/wv/school/html/control.htm
Addional information on content control resources ranging from browsers to filtering products.