PAR

PAR is for Perl as JAR is for JAVA.

Its used to bundled your perl scripts/modules together for easy deployment at client-side. Its easy to maintain, update and since its zipped, easy to download. The resulting PAR file contains all the dependent modules and needs only core Perl at the client machine. pp - eliminates the need to have core Perl at client machine.

A nice tutorial at http://www.autrijus.org/par-intro/TABLE_OF_CONTENTS.html