Free quick search software for mac

eBay Quick Search 1.0 is an excellent tool which quickly searches for selected text in many of eBay worldwide websites (eBay.com, eBay.ca, eBay.co.uk, eBay.com.au, eBay.be, eBay.es, eBay.fr, eBay.in, eBay.it, eBay.nl) from the context menu. It works with Firefox 2.0 to 3.5.

Google Quick Search Box is very experimental, but through it you will be able to see many of the explored areas: actions, contextual search, and extensibility.
Google Quick Search Box is by no means feature-complete, but is a very good indication of things to come.
Major Features:

1. It works as a location bar AND a search box - Itll autocomplete URLs and you can use TAB to search any website using Site Search.
2. The tab key has special functionality beyond just site search. It is equivalent to "search in this context": youll see that the results of a contextual search include related items, contents, and actions.
3. Calculation, Weather, and Definition one boxes will show up periodically. More are on the way. What else would you expect to see?
4. If you enable it, spotlight results will show up. Usually these are relegated to the "More" section at the bottom of the window, but once you use these items, theyll be learned and become much faster to access.