Super Simple Speed is a stable and powerful plugin that dramatically increases your page speed without any hassle (or clutter).
Speed up your website with Browser Caching. This Plugin enables Browser Caching in your Apache Web Server, which will make your website faster.
Configurable HTTP Cache-Control headers for webpages generated by WordPress.
Sends to a client correct HTTP headers Last Modified, Cache Control and 304 Not Modified
Allows users to specify that requests to their content not be cached in any way, easily from within the WordPress admin.
Adds the ETag, Last-Modified, and if appropriate 304 headers to HTTP responses generated by WordPress for more efficient caching.