innovaxp

Get control over your content, check what your users most like with NS Like This, a plugin that allow your users to save their favorite posts, pages, categories or tags, and review it in their favorite private page, automatically created and managed. They can also add an emblem to make the like more eye-catching.
You can track if the users do click in their favorites using the favorites page. Also, they can check what other users most like, making the like more social.
The plugin also adds 3 widgets:
<ul>
<li>Most liked content</li>
<li>Latest liked content</li>
<li>Most visited liked content</li>
</ul>
Translation ready (i18n), now includes full translation to:
<ul>
<li>English (default).</li>
<li>Italian.</li>
</ul>
If you have a new translation for your language, please send us by email and we’ll add it to the package.

NS Like This

This plugin allows your users to save their favorite content, and keep track of their favorites (add or remove), other user's favorites and click …

avrilmaomao

This plugin is based on “WP Favorite Posts”,and extends json api to provide access for mobile apps. 
Three methods are provided: 
wpfp/add 
 postid: required 
 cookie: optional 
wpfp/remove 
 postid：required 
 cookie：optional 
wpfp/lists 
 cookie ：optional 
The cookie param is the same as “JSON API USER” plugin used.
These methods support users not logged,if the client side can receive and send cookies.
code can be found at: https://github.com/avrilmaomao/wp-favorite-posts-extended

WP Favorite Posts Extended

wp-favorite-posts, reading list, post list, post lists, lists Requires at least: 3.5 Tested up to: 4.0 Stable tag: 0.1 Based on plugin "WP Favor …

NS Like This vs WP Favorite Posts Extended