The ultimate auto-tagging plugin for WordPress.
NOTE: The plugin is now being maintained on GitHub, so please do contribute all your questions, comments, suggestions, fixes and improvements with me here.
Title to Terms Ultimate is for every WordPress admin that needs tags, categories and other taxonomies filled out automatically. For each post type in your WordPress installation, T2TU will allow you to assign a taxonomy to be automatically updated with keywords pulled from the title of the post.
Every time a post gets saved or updated, T2TU analyzes the title of the post for usable keywords. A list of user-configurable “Stop Words” is checked by the parser, so that words like “I” or “going” don’t get made into ultimately useless tags.
Multisite admins take note: this plugin is especially helpful if you’re building a community-based site where tagging is important and your bloggers are not always diligent about tagging.