CrestaProject

FREE Crest Posts Widget is a simple but powerful WordPress Widget which displays your posts with thumbnail and many other options like the ability to show the date, the number of comments, to change the length of the excerpt, change the size of thumbnails and much more.
Some features:
<ul>
<li>Easy to use interface</li>
<li>Change post title heading tag</li>
<li>Display the date</li>
<li>Display the comments count</li>
<li>Choose thumbnail size</li>
<li>Choose excerpt lenght</li>
<li>Order posts by date, title, comment count and random</li>
<li>Filter posts by category</li>
</ul>

Plugin Homepage 
http://crestaproject.com/downloads/cresta-post-widget/

Cresta Post Widget FREE

Widget for show all posts or filter by category. Many options available including show thumbnail, excerpt, date and comments count.

WP Chill

CPO Widgets is a WordPress plugin that provides you with an number of essential widgets for any website. They give you additional functionality to easily display more varied content in your sidebars, such as images or tweets.
<ul>
<li><a href="https://wordpress.org/themes/ascendant/" rel="ugc">Ascendant</a></li>
<li><a href="https://wordpress.org/themes/affluent/" rel="ugc">Affluent</a></li>
<li><a href="https://wordpress.org/themes/allegiant/" rel="ugc">Allegiant</a></li>
<li><a href="https://wordpress.org/themes/antreas/" rel="ugc">Antreas</a></li>
<li><a href="https://wordpress.org/themes/transcend/" rel="ugc">Transcend</a></li>
<li><a href="https://wordpress.org/themes/intuition/" rel="ugc">Intuition</a></li>
<li><a href="https://wordpress.org/themes/illustrious/" rel="ugc">Illustrious</a></li>
</ul>
This plugin adds the following available widgets:
Recent Posts – A more powerful version of the default recent posts widget provided by WordPress. This widget allows you to display a thumbnail of each post and also to choose which post type to display.
Ad Space – Easily insert images without having to resort to writing HTML in a text widget. You can also link the image or add your own advertising code.
Social Profiles – Add links to your preferred social profiles, being able to choose from a long list of available social networks.
Recent Tweets – Display your latest tweets from any Twitter account. This widgets provides support for the Twitter API 1.1.
Flickr Images – Show your latest images from a Flickr account right into your sidebar, and linking to your Flickr gallery.
Author Badge – Display the profile of a specific user, showing the name, image, and profile description.
<h3>Included Widgets</h3>
<ul>
<li>Recent Posts</li>
<li>Image Banner widget</li>
<li>Social Profiles widget</li>
<li>Recent Tweets widget</li>
<li>Flickr Images widget</li>
<li>Author Badge widget</li>
</ul>

CPO Widgets

Add essential functionality to your WordPress sidebars with a set of useful widgets.

Cresta Post Widget FREE vs CPO Widgets