The strawberryperl.com site that you linked to is irritatingly lacking in both content and context (very little in the way of explanation, and zero(!) external links). Thought I'd save someone the trouble of googling it. It's part of the Vanilla Perl project, which aims to provide a Win32 Perl with a bundled compiler. Strawberry Perl extends Vanilla Perl to include a functioning Bundle::CPAN, and adds Win32-specific fixes.