WP Super Cache
WP Super Cache is a free caching plugin from Automattic, the company behind WordPress.com, that has over 2 million users worldwide.
The plugin converts your dynamic WordPress blog into static HTML files. The plugin’s static HTML files will be served to the vast majority of your customers after processing the considerably bigger and more expensive WordPress PHP scripts.
W3 Total Cache
One of the most popular caching plugins in the WordPress repository is W3 Total Cache. The plugin supports Google Accelerated Mobile Pages (AMP) and Secure Socket Layer (SSL) and can be coupled with a Content Delivery Network (CDN).
WP Fastest Cache
WP Fastest Cache is a wonderful caching plugin that is free to use, but there is a paid version that adds features like image optimization, database cleanup, mobile caching, and more.
The free version performs the same functions as other plugins: it generates static HTML files from your dynamic WordPress blog, reduces page size by minifying the HTML and CSS, and can disable emojis. WP Fastest Cache also offers browser caching, Gzip compression, and the ability to integrate CSS and JS.