Delayed is a multi-threaded, SQL-driven ActiveJob backend used at Betterment to process millions of background jobs per day. It supports postgres, mysql, and sqlite, and is designed to be Reliable (with co-transactional job enqueues and guaranteed, at-least-once execution), Scalable (with an optimized pickup query and concurrent job execution), Resilient (with built-in retry mechanisms, exponential backoff, and failed job preservation), and Maintainable (with robust instrumentation, continuous monitoring, and priority-based alerting).

A Rails engine to durably deliver schematized events to Amazon Kinesis via DelayedJob.

A configurable demo mode for your Rails app. Specify your desired "personas" and DemoMode will handle the rest.

A library to assist with clearing out Rails deprecation warnings and upgrading Rails versions

AutoAdmin: an Admin UI that prefers hints over directions

A minimalist approach to managing object state, perhaps best described as "an enum with guard rails." Designed to work with `ActiveRecord` and `ActiveModel` classes, or anywhere where Rails validations are used.