Arunas Liuiza

This plugin enables users to easily note the source of republished text. It adds a custom post type ‘Sources’ and a metabox to choose from various sources in post editing window.
ATTENTION: This is still an early development version (aka ALPHA), thus use with your own risk. It has the basic functionality, but not many configuration options and some bugs are probably present.
Basic functions:
<ul>
<li>Allows to create list of possible sources using Custom Post Types functionality;</li>
<li>Creates a meta-box in post editor screen to choose from list of available sources;</li>
<li>Customizable template – you can use your own html and shorttags %title%, %title_attr%, %text%, %img%, %img_h%, %img_w% and %link%;</li>
<li>You can use template tag <code><?php tinysource_show(); ?></code> to insert plugin output;</li>
</ul>
TO DO:
<ul>
<li>More customization options</li>
<li>Automatic insertion after post text</li>
<li>Localization</li>
</ul>

tinySource

This plugin enables users to easily note the source of republished text. EARLY DEVELOPMENT VERSION. DO NOT USE IN PRODUCTION ENVIRONMENT.

mlazarov

Easy way to add Tyxo counter tracking code. 
All you have to do is to add your Tyxo ID to the Tyxo plugin config page (under Settings).

Tyxo

Easy way to add Tyxo counter tracking code. All you have to do is to add  your Tyxo ID to the Tyxo plugin config page (under Settings).

tinySource vs Tyxo