iFour Technolab Pvt. Ltd.

“Ads After First Paragraph” is a Ads plugin that includes user Ads code to post or webpage after first paragraph. First paragraph is the most revenue generating and high impression place in a blog. This plugin also has another feature of adding sticky ads banner vertically both sides, right and left. Sticky banner is visible during complete user visit to your page or website.
Features
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Easy to use with Google AdSense and Bing or yahoo Ads Code.
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You can use any JavaScript or HTML codes in any of three location left sidebar, right sidebar and first paragraph of blog page.
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You can use any Ad Networks’ code.
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High Potential earning from your Website or Blog.
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Ads after first paragraph

This plugin includes user Ads code to post or webpage after first paragraph with additional feature of sticky Ads bar in sidebars.

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:
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<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:
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<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

Ads after first paragraph vs Opes WP Ads Manager