wpDiscuz – WordPress Comment Plugin is a powerful enhancement over the default WordPress commenting system, built to foster more interactive, modern discussions. It offers AJAX real-time commenting, inline commenting (letting users comment directly on specific parts of a text), multiple comment layouts, threaded replies, guest & registered user support, rating/voting on comments, social login options, and live notifications (comment bubbles, etc.).

In its Premium/Pro version, wpDiscuz extends functionality with features like media attachments (images/videos) in comments, user & comment mentioning, emoticons, advanced subscription tools (email notifications, user following, option to subscribe to replies), comment editing / deletion windows, enhanced statistics & moderation tools.