http://www.thewebracer.com/

The WebRacer is a combination of power
browser and power search tool. The WebRacer
allows you to open as many lightweight small
internal browsers as you like and manipulate
through them with ease You see a link you like
but don't want to lose your place? Well, drag
the link off of the page and drop it in the
background and voila a new web browser with
that page loaded. You can also drag and drop
links between browsers and drop files from the
explorer right into the WebRacer. These smaller
browsers do not take up nearly as much
memory as the full blown browsers so you can
have as many as you like and not cripple your
machine. 

The Search Wizard allows you to select from up
to 25 popular search engines and query them
for your keywords. The WebRacer will spawn
multiple threads and search each engine
simultaneously and then chase down each link
to make sure that it exists and contains your
keywords in the BODY of the page, so no more
false hits. The search results are stored in a tab
at the bottom of the screen and you can view
them now or save them for later. The state of
each link is saved so you know which links you
have visited and which you haven't.