OfficeTab is a free tool which provides the tab support in microsoft office programs like excel, word and powerpoint etc now when you open multiple documents and files in these office programs they will not appear in two separate windows, rather there will be a single windows with tabs representing these files opened.
From office Settings center you will need to open that office tab features is enabled for word, powerpoint and excel, moreover you can customize the layout and look and feel of the tabs going to appear. This small free to use office addon will make your life more simple and easy working with office with less number of opened windows.
It will make very easy to work with multiple opened documents and files in Microsoft office, as it is completely free addon so you don’t need to buy it :)
Download Office Tab [ version 1.21 ]