Additional Modules, which I am supposed to package, additionally, to my own stuff. Make sure they work on the target system. Dependecies beyond the perl core.
sorry, but you say you do "Templating without a System". What is a "system" for you?
HTML::Template (or HTML::Template::Compiled, to mention my own module) are just a couple
of files containing perl-code (also called pure-perl modules). You don't
want to be dependant on these, but you write your own Servlet.pm? (and you consider
the mentioned modules "systems", but not your Servlet.pm?)
I can't see what the above mentioned modules couldn't do for you. Only parameter
passing is a bit more work, but I consider it to be more clean to pass parameters
explicitly than to refer to real perl variables in a template.