Neatnik

Neatnik is a utility for neatening up folder windows. You might call it a "folder window wrangler"; it whips your folder windows into shape, setting their position, size and "View" options according to your preferences. Because it processes multiple folders at a time (even a whole disk's worth, if you like), it saves you the time and effort of setting up your windows one at a time.

Neatnik works under Mac OS 7.5 and later, but it has some enhanced features when used under Mac OS 8.