epipe-com

This plugin adds a favicon link to the document head section.
There are no options. The link is always added when the plugin is enabled.
The <code>favicon.ico</code> file needs to be uploaded to the site’s root 
directory. If you do not know how to do this, you should have a look at 
one of the other favicon plugins.

The Simplest Favicon

Adds a favicon link to the document head section.

Nazmul Hossain Nihal

This plugin is for adding favicons to WordPress site.
Using this you can add favicons to :
<ul>
<li>Home Page </li>
<li>Login Screen</li>
<li>Admin Panel</li>
</ul>

WPFavicon

This plugin is for adding favicons to WordPress site.

The Simplest Favicon vs WPFavicon