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Most Popular Tags is a WordPress plugin that allows you to display your blog’s most popular tags or categories as a sidebar widget. The plugin takes advantage of the new Widget API introduced in WordPress 2.8, allowing multiple instances of the same widget, each with it’s own unique configuration. You can specify how many tags/categories/link categories to show, the size of the smallest and largest ones, which unit and format to use as well as advanced ordering options.

Most Popular Tags

Most Popular Tags is a plugin that displays your WordPress site's most popular tags, categories and custom taxonomies as a sidebar widget.

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Minimalist Tag Cloud is a WordPress plugin that allows you to display your website’s most popular tags, categories or custom taxonomies as a widget or using a shortcode. 
The plugin styles the tag cloud in a minimalist style with the option to include tag count.
You can use Minimalist Tag Cloud as a widget or shortcode.
There are a number of options that you can customise:
<ul>
<li>number of items (tags) to show</li>
<li>type of taxonomies (tags / categories / custom taxonomies) to show </li>
<li>include/exclude a list of tags</li>
<li>smallest and largest font sizes</li>
<li>font size unit</li>
<li>display format (flat / list)</li>
<li>flat format separator</li>
<li>order by and order</li>
<li>show/hide tag count</li>
</ul>
Check ‘Installation’ tab for details on how to embed the shortcode.

Minimalist Tag Cloud

Very nice little widget. After looking through all the other tag cloud plugins this is the one I found most flexible.

It just needs a bit of styling on the way it displays on the backend. But it's not important. It does its job!

Thank you very much :D

Great customization!

Customisable widget and shortcode to display tag cloud with option to show tag count anywhere you want.

Most Popular Tags vs Minimalist Tag Cloud