The WordPress Instant Search and Suggest plugin begins displaying results as soon as your visitors start typing into the search box. It just works right out of the box. You can change the class/id (CSS) for the Instant Search section. The plugin lets you choose what should be included in its search suggestions. Limiting suggestion numbers is possible as well.
The WordPress Instant Search and Suggest looks pretty decent and makes your visitors experience on your website more convenient. It is easy to install too. What’s not to like?