Waterloo Plugins

Tag Cloud Widget adds a simple tag cloud widget that you can use anywhere on your blog. This plugin looks at all your tags and displays them in a widget. The more times a tag is used, the larger the tag is.
Each tag is a link to the tag page (e.g. http://your-site.com/tag/your-tag). This will help with SEO.
Currently, there aren’t any options to customize the tag cloud. It should work well out of the box. In the future, there may be options to customize the widget.

Good

A tag cloud widget with links to your tag pages

Flector

“HTML5 Cumulus” is a modern (HTML5 canvas tag based) version of the classic old “WP-Cumulus” plugin.
The plugin’s widget gives you a nice-looking 3D tag cloud in the sidebar that will work in all modern browsers, including mobile ones.
<a href="https://html5-cumulus.ru" rel="nofollow ugc">DEMO</a>
If you liked my plugin, please rate it.
The plugin uses <a href="http://www.goat1000.com/tagcanvas.php" rel="nofollow ugc">TagCanvas</a> jQuery plugin by Graham Breach.

HTML5 Cumulus

сам себя не похвалишь :)

cool :)

A modern (HTML5) version of the classic “WP-Cumulus” plugin.

Tag Cloud Widget vs HTML5 Cumulus