Comment Popularity adds the ability for visitors to vote on comments.
Karma is a powerful solution, providing a scoring system for your users, promoting participation in the web.
A simple 'I like this' plugin inspired by the facebook 'like' functionality.
Users can rate group forum posts in BuddyPress. Good posts are highlighted and poor posts diminished. Highlighted karma points shown for each user.
A Widget and a Shortcode that Displays Comments with good Karma as Testimonials. Plus the ability to Move comments and modify Karma.
This plugin/widget is the wordpress interface to your favourite photos, images and cliparts organized in slideshows at the Online-Slideshow-Community-
A plugin that improves community engagement by showing universal web-wide profiles for participants and by empowering the community to rate comments a