Metacrawlers

If a you are uncertain which search strategies will work with what search engines, there are several search sites that provide either a side-by-side comparison of search results from different search engines, or links which show your results in other search engines without having to re-type your search.

TurboScout Type your search once, then see it indexed in 21 different search tools.

PolyCola.com Choose two search engines to see results side-by-side.