iSearch has an accelerated search engine that can work equally fast in the background while you carry on your work.
It uses drag-and-drop to define search locations, and it remembers the most frequent locations used in a 'search in:' drop down menu list.
iSearch is a rapidly evolving application. Registered users receive every upgrade for free.
iSearch works fine on any Mac with system 7.1 or higher. It comes as a fat binary, meaning it's accelerated for the PowerPC, and also runs on Macs with the older 68000 chip.