StopDog 
Uses advanced filtering technology to deliver millions of web sites in a safe environment.
http://www.stopdog.com/AO-Soft
Offers a safe way to search on the web.
http://www.ao-soft.com/
ForParentsOnly
Dedicated to parents and parenting information on topics like adoption, family, pregnancy, baby names and home schooling.
http://www.forparentsonly.com/
AtomicSeek
Search with explicit keyword phrases blocked from resolving results.
http://www.atomicseek.com/
