Matt S. Trout has an interesting blog post about Perl call semantics. There are a number of things in there I was unaware of. Of particular interest to me is that this works:

  my $undef = undef;
  my $code = sub { "foo" };
  $undef->$code; # returns "foo"

POE::Filter::HTTPD::Chunked: As a big proponent of POE I thought this looked interesting. A drop-in replacement for POE::Filter::HTTPD that can deal properly with chunked encoding.

Template::ShowStartStop: Inserts comments in the generated output to show where one template ended and a new one begins. It overrides Template Toolkit's Template::Context to do this.