A smooth ajax-based like/dislike functionality for wordpress posts, pages, Custom post types..
Add a Twitter style love/like/upvote button to your content.
Add an applause/like/upvote button to your content.
Recommend allows you to add a like user action to your content. Unlike social sharing…
The plugin adds Thumbs up / down to any post type with a feedback form.
Simple like/unlike function for posts. No dislikes. Bring your own CSS.