ArcVieh

You can select images from media Library in the Widgets backend that will be shown on your Page. You can enter a size for the images.
The thumb-images will be linked to the full-sized-image. 
Requieres PHP 5!

Media Images Widget

Requieres PHP 5! You can select images from media Library in the Widgets backend that will be shown on your Page.

Kiran Potphode

Apply variety of filters and effects to image from Media library. Easy Image Filters allow you to easily manipulate images from your library. 
Saves new images directly to media library without affecting original image.From variety of available filters and presets you can create cool effects on images.
<h3>Features</h3>
<ol>
<li>Easy image manipulation without leaving your site admin area.</li>
<li>Plenty of filter options.</li>
<li>Choose preset to quickly apply predefined effects.</li>
<li>Save manipulated image directly to Media Library.</li>
<li>Simple interface to efficiently manipulate on image.</li>
</ol>
This plugin is implemented using <a href="http://camanjs.com/" rel="nofollow ugc">CamanJS</a>.

Easy Image Filters

Add cool filters and effects to images without leaving site admin screen. Save new image without loosing original.

Media Images Widget vs Easy Image Filters