Google Toolbar 2.0
Search the Web without having to visit www.google.com first. It sits in your Internet Explorer toolbar once installed and allows you to block unwanted pop-up ads, fill in forms with just one click, search within the pages of any site, and highlight the words you search for on a page.

 
OS: Windows 95/98/NT/Me/2000/XP
License: Freeware
Requirements: Microsoft Internet Explorer 5.0
Install Google Toolbar 2.0: