I don't know of any modules for you particular problem, but I would recommend looking at File::DirSync. Synchronization may not be what you are looking for, but the code used for directory comparison is probably just what you are looking for.

use File::DirSync;

my $dirsync = new File::DirSync {
           verbose => 1,
           nocache => 1,
           localmode => 1,
         };
$dirsync->ignore("CVS");
$dirsync->rebuild( $from );
#  and / or
$dirsync->dirsync( $from, $to );
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-Mark