Office Tab Free (http://www.extendoffice.com/download/office-tab-free-edition.html) adds tabs to Excel, Word & PowerPoint, just like web browsers. There is also a paid version (Office Tab Enterprise - $35) for the full version (adds tabs to most Office programs). They also offer Classic Menu for Office (http://www.extendoffice.com/product/classic-menu-for-office.html) which adds the old Office 2003 dropdown menus, and Ribbon Finder for Office (http://www.extendoffice.com/product/ribbon-finder.html), which adds a search box for commands.