http://pres.derickrethans.nl


http://www.mnot.net/cache_docs/

http://www.w3.org/People/Raggett/tidy/

http://www.ioncube.com

http://www.iagora.com/about/software/lingerd

http://www.remotecommunications.com/apache/mod_gzip/

http://www.php.net

http://www.squid-cache.org

http://www.webreference.com/authoring/languages/html/optimize/

http://www.zend.com