PageSpeed modules & plugins
PageSpeed can integrate with your web server to automatically optimize your site following web performance best practises.
Apache
Mod_pagespeed is an open-source Apache HTTP Server module.
https://modpagespeed.com/doc/download
Nginx
Ngx_pagespeed is an open-source Nginx module.
https://modpagespeed.com/doc/build_ngx_pagespeed_from_source
IIS
IIS WebSpeed is a commercial Microsoft Internet Information Services module.
www.iiswebspeed.com
Traffic Server
Ats_pagespeed is an open-source Apache Traffic Server module.
www.atspagespeed.com