Great tool here: http://www.petges.lu/
Small tool here: http://www.codeproject.com/KB/files/timestamp.aspx
One more way here: http://code.google.com/p/stexbar/

I've been using the 1st one for years.

>A few years ago, I built a few lines of code to update the time stamp of a file. However, tonight, we would like to obtain the same functionality from a small utility. There are a lot out there. Any recommandations on a clean one?