automaton

This plugin creates a tag cloud that has, per tag, an indication of that tag’s size, between brackets right after the tag and within the anchor text. This is for the benefit of screenreaders, who will read this information aloud. 
This additional text is hidden from screenreaders by an included styling class. I am working on an option to include your own.
I’d like to add some localization options, but I have insufficient PHP knowledge to implement that. If you’d like to help out, please let me know at http://www.automaton.be/contact/

Accessible Tag Cloud

Accessible replacement for the default tag cloud

Amaury Balmer

WordPress 3.1 and up allow for reasonably simple custom taxonomy, this plugin makes it even simpler, removing the need for you to write any code.
Add support for taxonomy with or without hierarchical. Choose the selector type for write post.
Allow to add taxonomy to any objects registered on your installation. This plugin can be coupled with the plugin ACF to a new term meta database that allow to create on fly any field need for the taxonomy. For example, for a “Number” taxonomy, you can add fields : number ID, date of parution, screenshot, etc !
This plugin is developped on WordPress 3.5, with the constant WP_DEBUG to TRUE.
This plugin allows you to add taxonomy just by giving them a name and somes options in the backend. It then creates the taxonomy for you, takes care of the URL rewrites, provides a widget you can use to display a “taxonomy cloud” or a list of all the stuff in there, and it allows you to show the taxonomy contents at the end of posts and excerpts as well. 
To boot, it comes with a set of template tags for those who don’t mind adapting their own theme.
For full info go the <a href="https://github.com/herewithme/simple-taxonomy" rel="nofollow ugc">Simple Taxonomy</a> page.

Simple Taxonomy

WordPress 3.1 and up allow for reasonably simple custom taxonomy, this plugin makes it even simpler, removing the need for you to write any code.

Accessible Tag Cloud vs Simple Taxonomy