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

Thomas Schmall

Tag clouds and Archives are useful for visitors, but also for search engines to find and index what topics your blog relates to. “Post Tags and Archives” makes it easy to add Tag Clouds or Archives to posts and pages via shortcodes. 
Before, you could only put it in the sidebar or widgets. That could hurt the search ranking for relevant terms and crowds the sidebar. So one either had to truncate the cloud and archive – or get rid of them (or use some more complicated trickery). 
Now you can just drop them in your posts and change the look easily via the options.
<h3>Options</h3>
Should be self-explanatory.
The advanced features: Please be careful with the HTML parts. 
The archive-format setting “options for dropdown-menu” is for people who want to setup forms. You have to add a proper form yourself – with select/post and all. Then this feature will add all archives (in the type you chose) as 
<h3>TODO</h3>
<ul>
<li>add products tag support 
Probably like this: 
$args = array( 
 ‘number’ => 15, 
 ‘taxonomy’ => ‘product_tag’ 
); 
return $args;Theoretically functional: from WP 1.5 (most features from: 2.5. “separator”-option from 2.9, “Tags-Order” for tags feature only from 3.5)</li>
</ul>

Post Tags and Archives

Display the Tag Cloud or the Archive directly in posts and pages, and change their look in the options.

Tag Cloud Widget vs Post Tags and Archives