If you are an experienced user of Facebook you are aware that it is possible to simply “love” an item instead of comment it. Now we have got a WordPress plugin to implement this for us.

I Like This plugin is fairly simple, you can add a meter and a button to vote in your theme to allow your visitors to shout loudly that they like what you write (if so). The first, as its name indicates, displays the number of people who liked this article and the other allows players who have not yet voted to do (if desired).

Pricing: Free
Requirements: -
Source: http://wordpress.org/extend/plugins/i-like-this/