TrashMan 4.0.5, written in 1993 by Dan Walkowski (who was at Apple at
the time) still works fine under OS 8.6. It's a background app and
a control panel and an application, so I expect it'll work
forever--Macs are like that.
(This is not the same item as the other TrashMan in the archive, BTW.)
The readme says "Place the 'TrashMan Emptier' on your desktop near
your hard disk icons. Drop the 'TrashMan Controls' and 'TrashMan
Engine' into your System Folder. Open the 'TrashMan Controls'
control panel, and choose your settings. Restart your machine.
Files will now be deleted from your trash after they are older than
the specified time limit. To empty all the trash on a particular
disk, drop the disk icon on the Emptier on your desktop."
It's shareware, $10, but I have no idea how to contact Dan.
Kiran