Katello adds Content and Subscription Management to Foreman. For this it relies on Candlepin and Pulp.

iQvoc - a SKOS(-XL) vocabulary management system built on the Semantic Web

Build your epic APIs same time you are building your website. Docs included

Beekeepeer: This gem is responsible for error logging, processing and rendering of errors in a standard JSON format..

A Manage IQ gem for Project Jellyfish

Api Setup.