ZirconKit Foundation had a bit of a branding issue. It was open sourced, yet followed a naming scheme shared by my paid offerings. So I've done something about that. ZirconKit Foundation is now called Artisan Kit and is hosted on GitHub.
Artisan Kit has been updated to support 64-bit builds. ZirconBreadcrumbs, ZirconCropper, and ZirconSwitch have all been updated to use Artisan Kit and also support 64-bit builds. Free updates are available for all purchasers, simply download new copies from the downloads page.