"Trusted by many popular blogs like: mashable.com, pearsonified.com, webdesignerdepot.com, freelanceswitch.com, briansolis.com, css3.info, tutsplus.com, yoast.com, noupe.com and others — W3 Total Cache improves the user experience of your blog by caching every aspect of your site, reducing the download time of your theme and providing transparent content delivery network (CDN) integration."
http://wordpress.org/extend/plugins/w3-total-cache/