Hyperwords – The Ultimate Search Tool
http://www.hyperwords.net/index.html

With Hyperwords for Firefox you can select any word on any web page and do useful things from the menu that appears: Searches, references, maps, translation, conversion,and much more! Watch the Demo, learn more from the User Guide or join the discussion in the Hyperwords Lounge, our dicussion forum. A basic function of Hyperwords is to select text on a web page and make it easy to get other information about the text. You are no longer restricted to following only the links others have made for you. Selecting text is simple: either double-click on a word, double-click between two words (like in a name) to select both, or stripe/drag-select a larger selection of text. If for some reason you want to find out who the prime minister of Kazakhstan is, just select Kazakhstan and select ‘References’ from the menu that pops up and then select ‘Wikipedia’ from the sub-menu. You should now be seeing the Wikipedia entry open in a new window to the left of your main window. You can even get the result right inside the menu, just hover over ‘Wikipedia’ (or any other reference or many searches, such as ‘people’ or ‘pictures’). This has been added to the tools section of Research Resources Subject Tracer™ Information Blog. This has been added to World Wide Web Reference Subject Tracer™ Information Blog.