Rectus Inc.

A plugin for convenient tag management. 
When posting, any tags that exist on the page will be automatically registered. 
You can also register or delete tags for all pages at once.

Rectus Auto Tagging

If a tag exists in a page at the time of submission, it is automatically registered. Tags can also be registered or deleted for all pages at once.

J0SiE

Created to help those people who don’t like to edit code in template files (or are too lazy to do that). 
Just activate the plugin and it will automatically show the_excerpts in your homepage, archives and search results. 
It tries to display your custom excerpt text and if it doesn’t find it it will show an automatically generated excerpt. 
You can also define excerpt length, custom read more link and attach a thumbnail.

Auto Excerpt everywhere

Thanks to author for creating this plugin. 
It's works out of box. And working fine at WordPress Version 4.6.1


Works out of the box on WP Version 4.6.1

The plugin automatically displays excerpts instead of full post contents in your blog. Custom excerpts and generated excerpts supported.

Rectus Auto Tagging vs Auto Excerpt everywhere