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

Erick Hitter

Creates lists of non-hierarchical taxonomies (such as <code>post tags</code>) as an alternative to term (tag) clouds. Multiple widgets can be used, each with its own set of options.
Numerous formatting options are provided, including maximum numbers of terms, term order, truncating of term names, and more. List styles are fully customizable, with built-in support for bulleted lists and numbered lists.
Using the <code>taxonomy_list_widget</code> function, users can generate lists for use outside of the included widget.
Only use version 1.2 or higher with WordPress 4.2 and later releases. WordPress 4.2 changed how taxonomy information is stored in the database, which directly impacts this plugin’s include/exclude term functionality.
This plugin was formerly known as the <code>Tag List Widget</code>. It was completely rewritten for version 1.0.

Taxonomy List Widget

Creates a list (bulleted, number, or custom) of non-hierarchical taxonomies as an alternative to the term (tag) cloud. Formerly known as Tag List Widg …

Accessible Tag Cloud vs Taxonomy List Widget