Good caching policies is one of performance’s best friends, and it can be your new best friend too. Get friendly with intermediary and browser caches by taking control over your WordPress powered website’s HTTP <code>Cache-Control</code> headers.
This is not a caching plugin in itself, but will enable you to leverage existing standard compliant caching systems better. You can set different policies for different kinds of pages to suite your website’s needs. The Cache-Control for WordPress plugin allows you to set different policies for shared/intermediary and private caches. The plugin sets some sensible defaults for a medium traffic blog that publishes an update or two per week.
You can safely set long <code>Cache-Control</code> times as the <code>max-age</code> values is lowered automatically before a scheduled post is about to be published.
Private pages (logged in users, the admin interface, etc.) will not be cached.
The plugin has <a href="https://www.ctrl.blog/entry/wp-cache-control-documentation.html" rel="nofollow ugc">extensive documentation</a>.

Cache-Control

Configurable HTTP Cache-Control response headers for webpages generated by WordPress.

John Cummings

** For Multisite/Network Users **
I wrote this plugin because of several situations I’ve run in to running a multisite network where I’ll want to include 
caching for WordPress sites in most cases, but might need to exclude one of the sites on the network from that caching.
By activating this plugin and checking the different caching options, requests to that sites pages/posts can be instructed 
not to cache site content without disrupting the caching strategy in place for other sites.
** For single site installations **
This plugin will still be useful for single site installations where the site administrator may not have access to the web server 
to specify the types of HTTP caching headers that are returned on each request. By allowing you to specify and rewrite the HTTP caching 
headers at the site level, you’ll no longer need access to the web server in order to make sure visitors are always served fresh 
content.
Bug Reports or Feature Requests 
https://trello.com/b/zLViVgjx
Follow me on Twitter 
https://twitter.com/jcummings1974

Simple Cache Killer

Allows users to specify that requests to their content not be cached in any way, easily from within the Wordpress admin.

Cache-Control vs Simple Cache Killer