Jan Štětina

This plugins adds two widgets: Classified Recent Posts and Classified Recent Comments. They differ from the default widgets only in one thing – each listed link contains HTML <code>class</code> attribute describing which post it is related to. For recent comments the whole <code>li</code> tag also contains this attribute.
Listed classes are similar to the output from <code>get_post_class</code> (see <a href="https://codex.wordpress.org/Function_Reference/get_post_class" rel="nofollow ugc">WordPress Codex</a>), each class has a prefix to prevent problems with CSS styling
<ul>
<li><code>crpw-</code> for Custom Recent Posts Widget</li>
<li><code>crcw-</code> for Custom Recent Comments Widgets</li>
</ul>
You can use this for example to highlight links to posts from chosen categories or witch chosen tags (or a particular post) via CSS.

HTML Classified Recent Posts & Comments Widgets

Default WordPress widgets with "class" attributes identifying posts added to links.

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.

HTML Classified Recent Posts & Comments Widgets vs CPO Widgets