alreadycoded.com

This wordpress plugin tracks no. of tweets, facebook likes and shares of your wordpress posts. This plugin uses twitter and facebook apis to get tweets, likes and share data without any api-key or registration.
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Social-Media-Monitoring

This wordpress plugin tracks no. of tweets, facebook likes and shares of your wordpress posts.

richymilo

Leo Gopal

Appends a custom likes box that allows a user to like any post type from the front end. 
Only one like is allowed per user/ip address. 
Once a user has liked the post type they can unlike it again by clicking on the same button. 
Plugin runs by using meta data and ajax.
The Plugin is configured via the admin page which is listed as a sub-menu item under “Settings”. 
The element that the box should be appended to as well as the post type to target should be selected.

Simple custom post likes

Appends a custom likes box that allows a user to like any post type from the front end.

Social-Media-Monitoring vs Simple custom post likes