Hi GraphicalGuy,

Do you know of any such software already in existence that performs this
function?

First of all there are the formula auditing options built into Excel you
can use that already do that in part.

I have built a reference utility that visualises all dependents and
precedents of a cell (up to a selective number of levels) in a treeview
like manner (like the folder list in explorer).

Contact me through my site if you're interested.

Regards,

Jan Karel Pieterse
Excel MVP
http://www.jkp-ads.com
Member of:
Professional Office Developer Association
www.proofficedev.com