WPKube

The plugin renders a tag cloud using a professionally designed tag image as a background.
The plugin’s tag cloud is completely responsive and is correctly rendered in all browsers.
The primary application of this feature is through the “Cool Tag Cloud” widget, but you can also use the shortcode [cool_tag_cloud] to display the tag cloud anywhere where shortcodes are supported.
Here is the list of parameters that can be used with the shortcode, each with its own set of potential values (which are separated by the | symbol):
<ul>
<li><code>style="default|silver|green|red|blue|brown|purple|cyan|lime|black"</code></li>
<li><code>font_family="Arial, Helvetica, sans-serif"</code></li>
<li><code>smallest="10"</code></li>
<li><code>largest="10"</code></li>
<li><code>align="left|right"</code></li>
<li><code>font_weight="normal|bold"</code></li>
<li><code>text_transform="none|uppercase|lowercase|capitalize"</code></li>
<li><code>number="20"</code></li>
<li><code>order_by="name|count"</code></li>
<li><code>order="ASC|DESC|RAND"</code></li>
<li><code>taxonomy="post_tag"</code></li>
<li><code>nofollow="yes|no"</code></li>
<li><code>animation="yes|no"</code></li>
<li><code>on_single_display="global|local"</code></li>
<li><code>on_archive_display="all|children|siblings|descendants"</code></li>
<li><code>exclude="1,2,3"</code></li>
<li><code>include="1,2,3"</code></li>
</ul>
If you liked my plugin, please rate it.
Special thanks to <a href="http://www.premiumpixels.com/freebies/tagtastic-tag-cloud-psd/" rel="nofollow ugc">Orman Clark</a> for the tag image and to <a href="http://dimox.name/beautiful-tags-markup/" rel="nofollow ugc">Dimox</a> for the CSS code.
This plugin is maintained by <a href="https://www.wpkube.com" rel="nofollow ugc">WPKube</a>, a WordPress resource site where you can find helpful guides like how to <a href="https://www.wpkube.com/list-building-wordpress-plugins/" rel="nofollow ugc">choose the right list building plugin</a>, <a href="https://www.wpkube.com/install-wordpress" rel="nofollow ugc">how to install WordPress</a>, <a href="https://www.wpkube.com/best-wordpress-hosting/" rel="nofollow ugc">choose the best WordPress hosting</a>, and more. 
They also have a huge collection of <a href="https://www.wpkube.com/coupons/" rel="nofollow ugc">exclusive deals</a> on various plugins and hosting services such as <a href="https://www.wpkube.com/coupons/wpengine-coupon/" rel="nofollow ugc">WPEngine</a>, <a href="https://www.wpkube.com/coupons/siteground-coupon/" rel="nofollow ugc">SiteGround</a>, etc.

Cool Tag Cloud

This came as a blessing when I had written some custom code to show a custom Taxonomy cloud on sidebar. The options to customize are so cool, and I love the option to either show the taxonomy related to a post on a Single post page or all tags, that makes it so versatile. Thanks so much to the author.

Very very Useful

Rickard Andersson

This is the highly configurable tag cloud widget, the main features for this plugin is:
<ul>
<li>All, single author or multiple authors per cloud</li>
<li>Select which taxonomies or post types to show tags for</li>
<li>Rules for which posts to include when fetching tags</li>
<li>Inclusion/exclusion functions</li>
<li>A bunch of ordering, coloring and styling options</li>
<li>Multiple strategies for selecting terms with the option to <a href="https://github.com/rickard2/utcw/blob/master/STRATEGY.md" rel="nofollow ugc">create your own</a>. Built in strategies for most popular, random, recently added, from current list of posts</li>
<li>Short code and API for developers</li>
</ul>
The development of this plugin has stopped. I will make sure that the basic features still work with upcoming WordPress versions, but no new features or changes will be made.
The <a href="https://github.com/rickard2/utcw" rel="nofollow ugc">code is available on github</a> and if you’re in need of new features, you’re welcome to submit a pull request for it.
Quick links:
<ul>
<li>Short code information: https://wordpress.org/plugins/ultimate-tag-cloud-widget/other_notes/#Theme-integration-/-Shortcode</li>
<li>Short code configuration options: https://github.com/rickard2/utcw/blob/master/CONFIG.md</li>
<li>Playground which shows some configuration options: https://0x539.se/wordpress/tag-cloud-playground/</li>
<li>Custom selection strategy documentation: https://github.com/rickard2/utcw/blob/master/STRATEGY.md</li>
</ul>
<h3>Feedback</h3>
This plugin is under active development and my goal is to try to help everyone who have issues or suggestions for this plugin. If you find bugs or have feature requests please use <a href="https://github.com/rickard2/utcw/issues" rel="nofollow ugc">GitHub issues</a>, if you need support please use the <a href="https://wordpress.org/support/plugin/ultimate-tag-cloud-widget" rel="ugc">WordPress forums</a>.
My contact information is
<ul>
<li>rickard (a) 0x539.se (email, hangouts, you name it)</li>
<li><a href="http://twitter.com/rickard2" rel="nofollow ugc">twitter.com/rickard2</a></li>
</ul>
If you use this plugin and like it, please consider <a href="https://0x539.se/donations/" rel="nofollow ugc">leaving a donation</a>.
<h3>Theme integration / Shortcode</h3>
You can integrate the widget within your own theme even if you’re not using standard WordPress widgets. Just install and load the plugin as described and use the function
<pre><code><?php do_utcw($args); ?>
</code></pre>
…with <code>$args</code> being a array of <code>key => value</code> pairs for the options you would like to set. For example if you’d like to change the title of the widget:
<pre><code><?php
$args = array( "title" => "Most awesome title ever" );

do_utcw( $args );
</code></pre>
To use multiple configuration options just separate them with a comma:
<pre><code><?php
$args = array( "title" => "Most awesome title ever", "max" => 10 );

do_utcw( $args );
</code></pre>
If you’re not able to change your theme you can also use the shortcode <code>[utcw]</code> anywhere in your posts or pages. You can pass any of the settings along with the shortcode in the format of <code>key="value"</code>, for instance if you’d like to change the widget title:
<pre><code>[utcw title="Most awesome title ever"]
</code></pre>
The plugin also uses a couple of filters for you to be able to alter the output. These are documented in the <a href="https://github.com/rickard2/utcw/blob/master/FILTERS.md" rel="nofollow ugc">filters documentation at GitHub</a>.
As of version 2.6 you can create custom selection strategies, more information can be found in the <a href="https://github.com/rickard2/utcw/blob/master/STRATEGY.md" rel="nofollow ugc">strategy documentation at GitHub</a>
<h3>Configuration</h3>
All the configuration options can be found in the <a href="https://github.com/rickard2/utcw/blob/master/CONFIG.md" rel="nofollow ugc">configuration documentation at GitHub</a>.
<h3>Breaking changes in version 2.0</h3>
<ul>
<li>Tags lists with named tags will not work in version 2.0, only tags lists with IDs.</li>
<li>The configuration option for text case has been renamed from case to text_transform</li>
<li>The styles for links aren’t marked as <code>!important</code> in the CSS longer, this might change the cloud presentation in some cases</li>
<li>The shortcode and theme integration function call no longer accepts the widget arguments <code>before_widget</code>, <code>after_widget</code>, <code>before_title</code> and <code>after_title</code></li>
</ul>
<h3>Thanks</h3>
The power of the open source community is being able to help out and submitting patches when bugs are found. I would like to thank the following contributors for submitting patches and helping out with the development:
<ul>
<li>Andreas Bogavcic</li>
<li>Fabian Reck</li>
</ul>
With your help this list will hopefully grow in the future 😉

Ultimate Tag Cloud Widget

Seems to be broken

This plugin aims to be the most configurable tag cloud widget out there, able to suit all your weird tag cloud needs.

Cool Tag Cloud vs Ultimate Tag Cloud Widget