Good News, Everyone!
I have just published some new projects using Grape, an opinionated framework for creating REST-like APIs in Ruby.
Grape Starter Kit
A boiler-plate / template for new grap projects using a structure similar to Rails: https://github.com/blocknotes/grape-starter-kit
Grape by Examples
Some common web tasks using Grape: cache, auth, orm, session, …: https://github.com/blocknotes/grape_by_examples
A multi-project API system: https://github.com/blocknotes/hydra-grape