The Contextures Excel Tools add-in saves you time and effort, when working with Excel files. For example, you can quickly:
--protect all sheets in the workbook
--fill blank cells with value from above
--add a sheet with a link to all worksheets in the file
The Excel tools add-in creates a Ribbon tab, and is for Excel 2007, and later versions.
(Windows only - not available for Macintosh).