Mason is a powerful Perl-based web site development and delivery engine. With Mason you can embed Perl code in your HTML and construct pages from shared, reusable components. Mason is designed to solve the common problems of site development including caching, debugging, templating, simulating browser conditions, maintaining development and production sites, and more. Mason can be used from CGI or stand-alone, however, it is optimally designed for use with mod_perl and Apache. Mason is currently being used by various well-known sites including Salon.com, TechWeb, Stamps.com, etc.