TagGator Pro is a complete WordPress solution for Tags, it will create, and assign them based on the keywords discovered in your contents.
Demo https://codecanyon.net/item/taggator-pro-wordpress-auto-tagging-plugin/1725033
Downloadhttps://www.filecad.com/egtP/TagGator-Pro-v2.0---WordPress-Auto-Tagging-Plugin.rar