limelightdept

Optimize page load times with full page caching. Improves Google PageSpeed Insights by an average of +30%.
Cache Ultra recompiles your javascript and css, then “snapshots” your pages into fully cached static html files. Automatically renews your snapshots every 8 hours to handle WordPress form tokens and such.
Also provides lazy loading site-wide or page-by-page. 
You’ll have full control of page resources and how they’re loaded on a per page or post type basis.
Create custom cache to handle the unique scripting needs for your site.
This plugin leverages our powerful caching API.
For more information visit http://www.limelighttheme.com

Cache Ultra

Optimize page load times with full page caching. Improves Google PageSpeed Insights by an average of +30%.

Matthew Haines-Young

Minification & concatenation of JS and CSS files can reduce the file size of your assets, and reduce the number of HTTP requests, helping improve page load times.
The plugin takes a manually defined list of script/style handles, and minifies and concatenates them into a single file which is then cached for future use.
Features.
<ul>
<li>Minifies & concatenates scripts and styles loaded using the WordPress dependency enqueueing system.</li>
<li>Handles scripts loaded in the header & footer.</li>
<li>Complete control – only a manually defined list of files is processed.</li>
<li>Multiple, independently processed files.</li>
<li>Minified files are only loaded if at least one component file should be loaded.</li>
<li>Compatable with localized scripts.</li>
<li>Helper tool – displays a list of scripts and styles enqueued on each page on the front end of the site.</li>
</ul>

MinQueue

Minify & Concatenate Enqueued Scripts & Styles.

Cache Ultra vs MinQueue