Yahoo UnSafeSearch

Search

Common uses for this script:

• Discovering censorship: webmasters can search their own sites to see which pages aren't being shown to all search users.
  
  
• Research: Knowing where search engine filters are strong and where they aren't is kinda interesting. (mostly they aren't)
  
  
• Finding porn: Streamlining your adult queries so there's less irrelevant vanilla stuff.
  
  

Related to: Google UnSafeSearch, and to Ask.com, which uniquely has this behavior right out of the box (bless their cotton socks).