Acrylic is a web micro-framework (akin to Sinatra) that simplifies and expedites development by using cascading routes.

Backend SDK for torii. Verify end-user JWTs without a per-request round-trip, call /api/server/v1/** with a secret key, and react to events from torii. Ships with Rack middleware that works with Rails, Sinatra, Roda, and anything else Rack-compatible.