http://cmsmart.net/magento-extensions/fast-search-search-autocomplete-by-searchanise Fast Search and Search Autocomplete Magento Extension brings customers with more effective ways to find products flexibly which helps to boot your business dramatically.

1. Fast Searchand Search Autocomplete -Searchanise
Fast Searchand SearchAutocomplete MagentoExtensionbringscustomerswithmore effectivewaystofindproductsflexiblywhichhelpsto
bootyour businessdramatically.
 Unlike default Magento autocomplete and other custom search extensions, Fast Search and Search Autocomplete Magento
Extension does not put any extra load on your server.
Fast Search and Search Autocomplete Magento Extension delivers relevant search results to your customers instantly as they
type. Autocomplete widget is highly customizable and naturally fits any storefront design.
The extended Search Pro package provides useful tools that will help you effectively use your store search to improve
conversion rates and grow profits: synonyms, recent searches, promotion tools, smart redirects, and more. You can upgrade to
Pro at any time, right in your admin panel.

2. Fast Search and Search Autocomplete Magento Extension is multi-store aware—the instant search widget can be customized
individually for each storefront or language you have.From the very first typed character, the magento extension ships smart
search suggestions and product previews. As the search term grows, the search results change in real time to become more
relevant.
Full list of features
o Searchwithsuggestedkeywords
o Searchwithcategories
o Easy Customizedstyle
o No hackcore
o Supportmultiple languages
o 100% OpenSource
o Supportall majorbrowsers
o Searchresultsquickly
o UsingAjax enabledtechnologies
o Ajax empowerdtechnology
o You can seta numberof the search results.