What are some good resources for HardCaml?

Github: https://github.com/janestreet/hardcaml

And Andy Ray and co's stuff:

Blogs: http://www.ujamjar.com/

Getting started overview and tutorials: http://www.ujamjar.com/hardcaml/

Running OCAML Bytecode in hardware: https://github.com/ujamjar/hardcaml-zinc