"Ajax Search Pro - Live WordPress Search & Filter Plugin!
Ajax search pro is the best live search engine plugin
for WordPress. Highly customizable, with many features
and options, giving the best results possible! Replace
the WordPress search bar with a better looking, more
efficient search engine.
Looking for a better WordPress search? Check out this
search plugins features, including checkbox, dropdown,
radio button category filters and custom field (post
meta) filters as well...!"