You can use Wget which is part of Mac OS, but runs on Windows or Linux too. Or more user friendly Httrack for Windows.
For Wget just run:
wget --mirror --convert-links --adjust-extension --page-requisites --no-parent http://www.yourdomain.com
You’ll still need to rewrite links so they don’t point at …/some-page/index.html so your users won’t notice. This solves Dynamic to Static Kit.