myQuickSearch is a small and very simple but nifty tool for the Menu bar that allows you to quickly perform searches without launching a new application.

BatchSpot’em is aimed primarily at users unfamiliar with Automator, this application enables you to add your own Spotlight keywords to a batch of Finder items.

Look at it as an extension to the keyword feature in iPhoto. You can add as many keywords as you like.

The Wegtam search agent tries to reduce the time for complex searches on the web. Wegtam features filtering, post filtering, meta search and further features.

Google Desktop lets you search your own Mac. (This has been available for PC for a while, but was just released for Mac.) You can search files, documents, music, email, chat transcripts, and Address Book contacts all from a single window. Sounds familiar? It is indeed a competitor to Spotlight. One cool feature is that it puts search results from your computer in the Google interface. So if you do a Google search in Camino, you can search Web, Images, Video, etc. OR Desktop — your own Mac.

Google Desktop installs a lot of files to achieve this functionality, and reviews haven’t been glowing, but the uninstaller successfully removes them all if you choose you don’t like it. It’s certain to get better over time and with user feedback.