XLCipher

This small utility reduces the file size of your Excel, Powerpoint and Word files. Not only it compresses your files but also it makes them faster and optimized. With its in built browser you can easily view and browse through the elements of your file that contributes to the size. For example if you have an Excel model which has 20 sheets you can see which sheet contributes the most to the Excel file so you can optimize it further. This software is Free to distribute and use, however advanced optimization of files and browsing the content is locked in the free version.

Requirements:

Microsoft Office Suite 2007

Limitations:

See description