Easily and losslessly optimize your WordPress images automatically. Everything works in the background, so there's very little set up.
Clean up and optimize your database by removing unused metadata, post revisions, and leftover data from plugins, among other things.
Significantly increase the performance of your site with static caching while keeping things simple and easy to use.
Easily set up third party Disqus comments on your site, and lazy load them in to give your site a boost in speed and performance.
Delay the loading of embedded videos from YouTube and Vimeo so that your page loads faster with increased performance and custom options.
Automatically compress and optimize images that are uploaded to WordPress on your own server. No need to use external third party services, and easy to customize.
Get a running list of MySQL queries on each page using a link in your admin bar. Groups queries together by different parameters and troubleshoot performance issues and errors.
Cache pages using mod_rewrite or PHP automatically. There are lots of ways to customize the plugin, but the main appeal of this plugin is that static pages are created on the fly without having to set too much up.
Picturefill.WP provides an easy way to add responsive images to your WordPress site, using the Picturefill polyfill developed by Scott Jehl and automatic image sizing.