Plugin Notes Plus is free WordPress plugin that allows you to track your plugins and mange them. Using this plugin you can easily know why you have installed a particular plugin.
Add robust comments to your site automatically, with support for notifications, subscriptions, badges and voting.
Easily set up third party Disqus comments on your site, and lazy load them in to give your site a boost in speed and performance.
Implements a very clever way of blocking spammers and spambots from posting comments on your WordPress install with no set-up.
Turn off comments on a post type by post type basis, or globally on your whole site, blocking them from view and removing it from the admin.
Set up a personalized KnowledgeBase or question and answer section on your WordPress site, with AJAX support and customizable permissions and notifications.
Add an email notification box to the bottom of comments in WordPress so users are told when their comments are replied to or when comment threads are new.
Easily allow the users of your WordPress install post images to comments by using a simple upload button at the bottom of each comment thread.
Adds the ability to publish post content on both Facebook and Twitter with custom messages, and to pull in social mentions across these sites back into your comments form with a new template.
Integrate your comments from the Disqus comments service into WordPress. You can moderate and control comments from your Disqus account, and automatically sync, import or export comments that already exist in WordPress. The plugin will store your comments in your database automatically.
Use Facebook comments on your WordPress install. Settings are available to customize the way the comments look and add them to any post or page automatically or with a shortcode.
Keep track of which comments have been replied to right from your admin panel. A new row will appear in your comments admin section that indicates whether or not it has been replied to, or it is from the post author.