Håkan Wennerberg

This widget requires WordPress 3.5 or newer.
Primary features of HW Image Widget:
<ul>
<li>Allow you to choose responsive or fixed behavior.</li>
<li>Fixed sized images allow you to define width/height with, or without kept aspect ratio.</li>
<li>Responsive sized images will allow you to define “fill width” or not.</li>
<li>Uses TinyMCE for rich text editing of the image text field.</li>
<li>Allow you to create a custom widget HTML-template in the active theme to override the default layout.</li>
<li>Default settings can be overridden using filter.</li>
<li>Works with Carrington Build.</li>
<li>Works with the theme customizer.</li>
<li>Available in English and Swedish.</li>
</ul>
For more info, visit http://webartisan.se/hw-image-widget/

HW Image Widget

Image widget that will allow you to choose responsive or fixed sized behavior. Includes TinyMCE rich text editing of the text description.

Cedaro

Brady Vercher

Simple Image Widget is what the name implies — the easiest way to add images to your sidebars. Display advertisements, calls-to-action, or even build a slider based on image widgets.
Despite its simplicity, Simple Image Widget is built with extensibility in mind, making it super easy to spin off new image-based widgets, or customize the widget ouput using the available template hierarchy.
<h3>Additional Resources</h3>
<ul>
<li><a href="https://wordpress.org/support/view/plugin-reviews/simple-image-widget#postform" rel="ugc">Write a review</a></li>
<li><a href="https://github.com/cedaro/simple-image-widget" rel="nofollow ugc">Contribute on GitHub</a></li>
<li><a href="https://twitter.com/cedaroco" rel="nofollow ugc">Follow @cedaroco</a></li>
<li><a href="https://www.cedaro.com/?utm_source=wordpress.org&utm_medium=link&utm_content=simple-image-widget-readme&utm_campaign=plugins" rel="nofollow ugc">Visit Cedaro</a></li>
</ul>

Simple Image Widget

A simple widget that makes it a breeze to add images to your sidebars.

HW Image Widget vs Simple Image Widget