Tabs On Your Google Personalized Homepage

This is a pretty nice add-on despite it not being created by Google. It will add customizable tabs, like the ones pictured above, to your Google Personalized Homepage. You can rename tabs, remove tabs, reorder tabs, create tabs, and move modules between tabs.

All you have to do is add the module to Google: Add to Google

If you want to know how to use the tabs then here is the help guide that shows you the various things you can do.