Add boutons for "Like" or "Unlike" (can be set up) your posts and pages.

Allows you to add links 'I like / I do not like' to each post and comment.

Post like is a simple ajax based post like/unlike plugin that help your visitors to like posts. Counter shows number of post likes.

Connect AutomatorWP with WP Ulike

The Voter plugin adds a recommendation engine (voting or like/unlike features) on any WordPress blog or website.

Connect GamiPress with WP Ulike