Relationships (e.g. friendships) backed by Redis

Wraps memcached, redis(-namespace), memcache-client, dalli and handles their weirdnesses, including forking

Flexible configuration for Ruby/Rails applications with a variety of backends

Fault-tolerance tools for ruby based on circuit-breakers

Description of Firebase::Auth::Rails.

Redis output plugin for Fluent

Linearly scale Heroku dyno counts based on sampled metrics

Monitor the progress of remote, long-running jobs.

Can be used to implement all kinds of throttles

A simple event bus on top of common background queues. Publish and subscribe to events as they occur using what you already have.

Failover for ActiveRecord and Redis

Rate limiting based on Generic Cell Rate Algorithm

Pessimistic locking for ruby redis

Redis-backed rate limiter

A gem to help build event-based code in Ruby

Hyper simple job workflow engine

The easiest way to check how many times a URL has been shared on Reddit, Digg, Twitter, Facebook, LinkedIn, GoogleBuzz and StumbleUpon!

Server Sent Events for Sinatra

Ruby Socket.IO emitter implementation.

Achievements is an abstract, Redis-backed, counter based achievements engine designed to be included in Model classes in web applications. Achievements lets you track and persist user actions with a simple bind and trigger design pattern.