Koingo Software has released Amnesia 1.5 (http://www.koingosw.com/products/amnesia.php )for Mac OS X. Amnesia performs a smart scan to determine all related files to be removed. The app now uses a threaded process to search for apps with Spotlight and now performs an internal consistency check before allowing the application to launch.
With Amnesia, you can uninstall applications, preference panes, screen savers, and Dashboard widgets, as well as all their related files. In addition, turn on a secure deletion option to prevent recovery of the removed files.
Amnesia comes with a built-in backup function that creates an archive of related files in case you wish to restore them at a later time. It will reinstall the pieces of the product exactly where they came from — even if you choose to restore to a different machine.
Another feature Amnesia has to offer is the ability to create a list of untouchable software sets (in addition to the ones built-in). They’re software products that Amnesia will warn you about in case a removal is attempted. This is handy in case a particular software product should be removed using a manufacturer-provided uninstaller instead.
Amnesia costs US$19.95 and requires Mac OS X 10.4 or later, though version 1.2 is a free update for registered users. A 15-day trial copy is available for download.