http://qs321.pair.com?node_id=70946
Description: Based on vroom's suggestion(someplace), this script recurses through the directories in @INC, and prints out a list of files found there. You can also print only files ending in '.pm', that's why the 2 subroutines. I did this recently because my host throws an error at `perldoc perllocal`. (update: hmm, maybe I would have had better luck with `perlman perllocal`)
sub whats_installed
{
    require File::Find;

    for my $ix(0..$#INC)
    {
        print $INC[$ix], "\n";
        File::Find::find(sub { print $File::Find::name, "\n"},$INC[$ix
+]);
    }
}

sub whats_installed2
{
    require File::Find;

    for my $ix(0..$#INC)
    {
        print $INC[$ix],"\n";
        File::Find::find( sub {substr ($_, -3) eq '.pm' && print $File
+::Find::name, "\n";}, $INC[$ix]);
    }

}