Server-side Information, SSI PRO

Description
Your are a Webmaster, a programmer, a customer or you are simply an owner or a buyer of programs for your own site. How often do you face the challenge when you are not sure is there any module on your hosting? Why the script which you bought / downloaded doesn't work? Why the technical support service assures you that the module, which you wanted, is installed, and your script does not work as before? How to determine the version of the modules installed? How to determine the Perl version? How to find, where the libraries and modules are installed? Do you want to have information about the server-side environment including a list of all installed Perl modules with a handy link to their documentation at CPAN?