Inline Search is an extremely useful free add-on for Internet Explorer that mimicks Firefox's search behavior i.e. it turns searching into a web page into a non modal research experience coupled with a search as you type facility.
Now there is a new plugin, ContuttoAdvancedSearch, that does not only provide more search functions, but it also uses a much more effective search method: MySQL’s fulltext search.
Search Meter is a WordPress plugin that helps you keep your blog focused on what your visitors want to read. It does this by keeping track of what your visitors are searching for.
When visitors is referred to your site from a search engine, they are definitely looking for something specific - often they just roughly check the page they land on and then closes the window if what they are looking for isn’t there. Why not help them