Gotta use Google if for nothing else the spell check- I am not the worlds best speller so I use the spell check for all my posts and online correspondence. I will use it to check this post.
I also use MSN and RoboForm -Toolbars oh yea and Kiwes it has MSN live search
I suggest that all internet marketers use "alexa" and "google" tool bar so they can identify popular, quality sites to put forth marketing efforts.
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I have installed Google and Yahoo Toolbar on my PC as they are the best and much helpful. If you are looking for some good toolbar than you go for Firefox toolbar for developer and seoquake toolbar for firefox. They are firefox pulgins and available for free.