Navipane contacted me to review their addin for Excel on this site.
I went to the Navipane website, downloaded, installed and used the Navipane addin for Excel. I noticed there a bunch of similar addins for other Microsoft Products, notably PowerPoint, Word and Access.
I am using Excel 2007 so this review relates to how I interacted with Navipane in that environment.
When installing you are required to have Excel closed.
The first thing I noticed after opening Excel again was that there was an addin menu called Navipane in the ribbon, and a resize able tabbed window had opened up on the right hand side of the Excel pane titled Navipane System.
The tabs listed are Home, Sheets, Favorites and History.