From the Houdah Blog:

Now that you have all your documents stored and organized in DEVONthink, you can rely on both DEVONthink and HoudahSpot to always find the piece of information you need.

I don’t use HoudahSpot often, but when I do it does a fantastic job of finding exactly what I need. HoudahSpot is a tool that performs searches on your Mac using almost any parameter available. When your search is done, you can sort the results multiple ways.

The blog post explains how to set up DEVONthink so it works with HoudahSpot, and also includes a DEVONthink search template.

(From the Houdah Blog, via Devonian Times)