"Meta Accelerator" can speed up metaquery.
The pluginplug-in, with two additional SQL queries, joins the original data sample $wp_query->posts all meta fields, all files and images.
Rewrites links to static files to your own CDN network.
CDN Tools is a plugin designed to help you drastically speed up your blog's load time by loading data onto a content distribution network (CDN).
Speed-up page updating, when using custom permalinks and a lot of pages.
The Internet Explorer 8 Accelerator plugin enables you to post an entry with selected text of any web-page to your WordPress blog.