Studiofreya

SF Generate Tags is a plugin that helps generate tags for posts. It scans the names of all attached images and/or the post content (text) and places the resulting tags in the built-in WordPress “Tags Widget” in the post editor. 
The plugin analyzes collected words and picks out the most suitable for tags. 
All tags are then sorted in descending order and posted into the Tags widget. 
If you don’t like a tag which has been discovered and want to delete them, you can just click the X button and save post without them. 
The plugin doesn’t mess with your existing tags. It preserves all your existing tags for the post. All the actions can be easily undone.
This plugin should work with any language. It’s filtering algorithm is designed for English. All other languages will have all the words be added as tags.
<a href="https://studiofreya.com/wordpress/sf-generate-tags/" rel="nofollow ugc">SF Generate Tags website</a>
<h4>Features:</h4>
<ul>
<li>Easy to use from the admin panel for post edit </li>
<li>Choose to generate tags from attached images or post text or both</li>
<li>Exclude words that you don’t want to be tags</li>
<li>Easy to remove all undesirable tags</li>
<li>All actions can be undone</li>
<li>Existing tags are preserved</li>
<li>Add other tags later</li>
<li>Regenerate tags after updating the post (or not)</li>
<li>Limit number of generated tags</li>
</ul>

SF Generate Tags

Generate tags for posts from images or/and post text.

Creato

Simply upload your icons individually to your theme’s “images/csprite” folder.
Go to WordPress Dashboard > Tools > CSprite > Rebuild to rebuild the sprite.
CSprite will do all the hard work of combining all the images into a single graphic.
It will create all the classes for you in the enqueued stylesheet.
You can then simply use the sprite in your theme like this:
<div class="csprite csprite-creatomatic_logo"></div>
It will name the classes according to the image names, so make sure that they are unique.
Read more about this plugin at http://www.creatomatic.co.uk/csprite-automatic-image-sprite-tool-wordpress/

CSprite

The automatic image sprite generator for WordPress

SF Generate Tags vs CSprite