Simple, but very useful and powerful plaugin, which adds to your WordPress-powered website a special widget which can show unlimited banners in any siderbar of you theme.
All you need to do is to place it in the right place, add title, URL of the banner’s image and your affiliate link.
Features:
<ul>
<li>Unlimited banners to any sidebar of your website;</li>
<li>Show up any .jpg, animated .gif or transparent .png image;</li>
<li>Customize the width of every banner with ‘width’ parameter. No need to fill in the height.</li>
</ul>
Ownyourblog Banner Widget is bulletproof solution tested on many blogs.

Ownyourblog Banner Widget

Simple, but powerful widget to show any banner you want in your sidebar. One-click solution!

Bamboo Manchester

This plugin adds a ‘Slide’ post type to WordPress. These work like normal posts, and can be grouped into ‘Slide Groups’ which work just like post categories. Once you have created all your slides in the appropriate groups, you can add a slider to any page or post by using the bamboo-slides’ shortcode. You can have multiple sliders on one page, and they can be anywhere you like, so they work just as well for footers as they do for banners.
Each slide can contain any type of content that a post can, and depending on the chosen mode, the slides will be switched , faded, or slid into view. Slides can also have a feature image, which if supplied will be used as the background image for the slide.
Usage
Insert the ’bamboo-slides’ shortcode into your content as follows:
<pre><code>[bamboo-slides group=homepage slides timer=4 buttons=on indicators=on mode=fade]
</code></pre>
All of the attributes are optional, with the following possible values:
group 
Selects the group of slides to display, if not set all the slides will be displayed regardless of which group they are in
timer 
Number of seconds to wait between each slide, if set to 0 the slides will only change when the buttons are used
buttons 
If this is set then the slides will have buttons enabling the user to advance the slides manually
indicators 
If this is set then the slides will have indicators at the bottom indicating the current slide
mode 
switch Simple switch from one slide to next 
fade Fade each slide in and out 
slide_left Slide from right to left 
slide_right Slide from left to right

Bamboo Slides

With three different animation styles, Bamboo Slides allows you to incorporate a cool looking interactive banner or slideshow into any page – no codin …

Ownyourblog Banner Widget vs Bamboo Slides