"WatchCat v2.0 is a small applet for hiding application windows. Windows
hidden by WatchCat also will disappear from taskbar and ALT+TAB chain.
It's extremely convenient if you need to keep applications as MS Outlook
open all the time but don't check them often. WatchCat also can
minimize windows to system tray, hide or close windows if they were
unused some period of time."
ftp://ftp.simtel.net/pub/simtelnet/win95/desktop/wcat200.zip