Plugin, that controls your advertisement codes (such as Google Adsense, <a href="http://2lx.ru/2008/09/zorka-udobnyj-cop-beguna/" title="Zorka (ru)" rel="nofollow ugc">Zorka (ru)</a>, counters/ratings, etc.) in begining and ending of posts. 
All the information (general, changelog, installation, usage) you need about this plugin in russian can be found here: <a href="http://2lx.ru/2009/02/wp-advert-manager/" title="WP Advert Manager" rel="nofollow ugc">WP Advert Manager</a>. 
It is the exact same readme.html is included in the zip package.
<h3>Development Blog</h3>
<a href="http://2lx.ru/" title="Блог неизвестного веб-мастера" rel="nofollow ugc">Блог неизвестного веб-мастера</a>

WP Advert Manager

Plugin, that controls your advertisement codes at your WordPress blog.

twapaw

Opes WP Ads Manager is a simple plugin that allows you to show advertisements as a widget on the website
 Just works! 
Major features in Opes WP Ads Manager include:
<ul>
<li>Since version 1.2.0 only one widget can be add and only two ads can be shown</li>
<li>An ad as a custom post type</li>
<li>An every ad can link to specific web page</li>
<li>A widget generator</li>
<li>A custom post featured image used as an ad</li>
<li>Ad sizes management (use Regenerate Thumbnails plugin to extend management of the sizes image files)</li>
</ul>
PRO Version (available soon) features:
<ul>
<li>Stats</li>
<li>Not limited widgets and ads can be add</li>
<li>Management of order of ads in a widget</li>
</ul>

Opes WP Ads Manager

Opes WP Ads Manager allows you to show advertisements on the website

WP Advert Manager vs Opes WP Ads Manager