Search Unleashed
Extends the standard WordPress search to include data from posts, pages, comments, and meta-data, as well as the full content of data inserted by plugins.
Search Everything
* Search Highlighting
* Search Every Page
* Search Every Tag
* Search Custom Taxonomies ( new )
* Search Every Category
* Search non-password protected pages only
* Search Every Comment
* Search only approved comments
* Search Every Draft
* Search Every Excerpt
* Search Every Attachment (post type)
* Search Every Custom Field (metadata)
* Exclude Posts from search
* Exclude Categories from search
Google Custom Search Plugin
The default search engine that ships with WordPress is not the best search engine and bloggers every where should make the switch to WordPress Google Custom Search plugin. This plugin is a drop in replacement and works with minimum hassle
