Add 16×16 favicon after all the links in your posts. 
The favicon’s tag has a ‘favlink’ class so you can CSS it as you wish.

Karedas Favicons

Adds corresponding favicon from Google Shared Stuff after every links in your posts.

whyte624

The plugin adds favicons of websites to links which they lead to. 
If a link has image inside (img tag), then favicon will not be added.
To suppress favicon for your link add ‘data-no-favicon’ attribute to the a tag: 
<a href="http://example.com" rel="nofollow ugc">my link</a>.
Uses Google S2 Favicon service.
Report issues or/and contribute here: https://github.com/whyte624/wordpress-favicon-links.

Favicon Links

Adds favicons to links in posts to give them nice look.

Karedas Favicons vs Favicon Links