⚡ A Scope & Engine based, clean, powerful, customizable and sophisticated paginator for Ruby webapps

Track changes to your rails models

EventMachine: fast, simple event-processing library for Ruby programs

Actor-based concurrent object framework for Ruby

[DISCONTINUED ] Attributes on Steroids for Plain Old Ruby Objects

minitest provides a complete suite of testing facilities supporting TDD, BDD, and benchmarking.

View components for Ruby and Rails.

Authorization service and frontend for Docker registry (v2)

Ruby Date Recurrence Library - Allows easy creation of recurrence rules and fast querying

Active Record, improved. Live again :)

Magical authentication for Rails 3 & 4

Enables consumer driven contract testing, providing a mock service and DSL for the consumer project, and interaction playback and verification for the service provider project.

faster, friendlier Docker on OS X. Deprecated.

Map Redis types directly to Ruby objects

A Relational Algebra

Efficient, Immutable, Thread-Safe Collection classes for Ruby

Parse and render REST API documents using representers.

RSpec tests for your AWS resources.

Fixtures aren't fun. Machinist is.

A collection of Rack middleware to support JSON Schema.

Webmachine, the HTTP toolkit (in Ruby)

DataMapper - Core

self assembling fabric of ruby daemons

A scheduler process to replace cron

Convergent Replicated Data Types

UNMAINTAINED: See celluloid/celluloid#779 - Actor-based distributed objects in Ruby based on Celluloid and 0MQ

Generates universally unique identifiers (UUIDs) for use in distributed applications.

Simplifies querying of structured data using relational algebra

The latest features of Ruby backported to older versions.