Devulder Software has released Watch Folders for Mac OS X (10.6.6 and higher). It costs US$2.99 and is available at the Mac App Store.
The software keeps track of all events for a selected directory. It informs you of any changes, creation, deletion of files live. You can print or save the list of events at any time. The software is available in English and French. To buy it go to http://tinyurl.com/pv2x7dm .