Posts comments without refreshing the page and validates the comment form using Ajax.
There are many comment-related plugins in WordPress plugin directory. However, if you'd like to find just a simple, reliable comment-posting Ajax plugin, you won't find any. That's why I developed a simple and small yet functional Ajax Comment Posting (ACP) plugin. Not only will it post your comment without refreshing the page, but it will also make sure that you've filled all the form fields correctly.
As the new Google Analytics code conflicted with the plugin, a built-in support for GA has been added. Read the FAQ for more information.
ACP should work with all CAPTCHA word-verification plugins, but I personally suggest using Akismet.