These are my custom plugins I've written for Ansible (https://github.com/ansible/ansible):

This plugin mimicks the behavior of group_vars and host_vars in the inventory and playbook in the user's home directory (~/.ansible to be exact). _host_allowed_facts and _group_allowed_facts can be empty (allow any facts) or contain a list, in which case it will filter out any other facts.

This plugin adds a jinja filter to your runtime (humansizetobytes) which converts Human readable sizes into bytes.