Smart Posts Tagger plugin makes generating tags for posts much easier. WordPress Smart Posts Tagger has two main elements: integration into post editor panel Tags meta box and powerful Auto Tagger to generate tags for all posts. WordPrss Smart Posts Tagger Plugin supports custom taxonomies and custom post types. To extract tags, plugin supports internal extraction engine and 4 online extraction engines to generate tags based on the content.
Free Smart Posts Tagger Plugin can be used to add tags for bbPress topics (topic tags), WooCommerce products (product tags) and other plugins that use non hierarchical post tags like custom taxonomies.