jfoucher

This plugin uses the yahoo.com API to find the most relevant keywords from the content of your post, and then adds them as tags.
The tagging is fully automatic, so if you’re using a plugin like feedwordpress to display RSS feeds on your blog as posts, everything will get done as the feed posts are published. No user intervention necessary!

Auto-tags

Automatically add relevant tags to new posts.

TagBee

<a href="https://tagbee.co" rel="nofollow ugc">TagBee</a> is the easy way to add tags to your posts.TagBee works in a simple way: it proposes tags for your content. However, under the hood, TagBee uses machine learning and natural language processing to give you the best and most personalized results!

TagΒee Post Tagger

TagBee is the easy way to add tags to your posts.TagBee works in a simple way: it proposes tags for your content. However, under the hood, TagBee uses …

Auto-tags vs TagΒee Post Tagger