Here's the latest offering from Google, the Google Viewer: http://labs.google.com/gviewer.html
Also, if you are a Windows user with Internet Explorer and haven't yet tried the Google Toolbar, give it a shot. It's available at toolbar.google.com -- http://toolbar.google.com It's so nice having the search capability right there at the top of the browser, all the time.
Once you have it installed, click the down arrow next to the Google logo and select "Toolbar Options" to customize the toolbar. The Experimental Features at http://toolbar.google.com/experimental are really helpful.
Google just keeps getting better and better
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