web_lid

Bannerlid provides a simple WordPress admin extension to add banners and groups of banners to your WordPress template or your WordPress content. Banners can be added through content shortcodes or functions in your template files.
The plugin also tracks clicks and impressions and displays the data in html5 charts in wp-admin. Stats include who’s been clicking, when and where from.
Banners can be standard graphic file such as gif or png. It also supports flash banners, although these can cause speed and compatibility issues.
The plugin does not facilitate the selling of banners or banner space. I created this to be a simple Banner management system that provided clients with simplicity and important stats rather than to try and do too much.
The plugin comes with some basic filters and hook actions for customization.

Bannerlid

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

Bannerlid vs Opes WP Ads Manager