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perl_modules.pl

#!/usr/bin/perl

use ExtUtils::Installed;
my $instmod = ExtUtils::Installed->new();
foreach my $module ($instmod->modules()) {
my $version = $instmod->version($module) || "???";
       print "$module -- $version\n";
}

remove_perl_module.pl

#!/usr/bin/perl -w
use ExtUtils::Packlist;
use ExtUtils::Installed;

$ARGV[0] or die “Usage: $0 Module::Name\n”;

my $mod = $ARGV[0];

my $inst = ExtUtils::Installed->new();

    foreach my $item (sort($inst->files($mod))) {
             print “removing $item\n”;
             unlink $item;
          }

     my $packfile = $inst->packlist($mod)->packlist_file();
          print “removing $packfile\n”;
          unlink $packfile;

http://www.cpan.org/misc/cpan-faq.html