alphabetical – The unofficial WordPress Plugin Directory

Sortacular – Instantly Sort and Organize WordPress Admin Menus Alphabetically

Clean up your WordPress admin menus instantly by sorting menu items alphabetically. Sort menus like Settings and Tools, leaving Core items untouched.

This Widget will show A-to-Z listing of all the categories and its subcategories in alphabetical order

Create and display a list of first characters for post/cpt titles which link to an archive of the posts/cpts that begin with that character.

Create a glossary on your WordPress site to boost SEO, help visitors understand your content, and increase organic search traffic.

WP-SNAP! (WordPress System for Navigating Alphabetized Posts) creates an user interface for navigating alphabetized post titles.