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

jonathantneal

SVG Spritemap lets you add SVGs with the Media Uploader, as well as create and manage an SVG spritemap from your Media Library.
<h3>Contributing</h3>
The Git repository for the project may be accessed here: <a href="https://github.com/jonathantneal/wp-svg-spritemap/" rel="nofollow ugc">https://github.com/jonathantneal/wp-svg-spritemap/</a>

SVG Spritemap

SVG Spritemap lets you add SVGs with the Media Uploader, as well as create and manage an SVG spritemap from your Media Library.

CSprite vs SVG Spritemap