Following is a list of tried and tested Ajax Powered plugins for your wordpress blogs, you can use these based on your requirement. These certainly improve usability and adds cool functionality to your blog.
Live Spell Checker – This plug-in lets you add a spell checker to the admin area to check your posts with.
Plug â€˜nâ€™ Play Google Map – You can add any post you write with longitude and latitude to a Google Map on a separate page. Very useful for blogs writing about various locations, restaurant reviews or events.
WordPress Mailing List – Create a mailing list of your own? Let readers subscribe and unsubscribe simply from the blog’s homw page.
WP e-Commerce – Adds a shopping cart to your WordPress powered site.
WP-Polls – Adds fully customizable polls for your readers to take.
WP-Post Ratings – Allows readers to rate your posts.
AjaxWP - Adds AJAX to your WordPress site speeding up the load times.
Alexa Rank – Display your Alexa rank on your blog.
Ajax Comment Preview – Allows readers to preview their comment before submitting.
asTunes – This plug-in retrieves data from your Audioscrobbler/last.fm profile and posts it as a list on your blog.
Codebox – Add a side scrolling box for displaying code snippets on your blog.
FireStats – This will provide full featured statistics including referrers and popular pages.