Xippee is a free browser plugin that makes it easy to refine your query using words from the search results pages. For e.g. you want to find information about the Chrome game and you search for [Chrome]. Most of the results are related to Google's recently-released browser, so you can just select "Google", click on the "-" button and you'll get the results for [Chrome -Google].
Xippee works in Internet Explorer 7, Firefox, Opera, Safari and you can use it in Google, Yahoo and Live Search. For Mac Users: If you are not using the Leopard operating system and Xippee does not work for you, please try previous installation package.
Source:→ Google System