I am Magi.

initiate a M-Pesa transaction on behalf of a customer using STK Push.

Notifyer creates growl notifications on your desktop if something happens in your Rails app.

A WebRTC signaling server implemented with WebSockets, EventMachine and Redis Pub-Sub

Take a peek into the Redis calls made within your Rails application.

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

ORM for Redis (advanced key-value storage) with ActiveRecord API

Redis-backed rate limiter

Related is a Redis-backed high performance distributed graph database.

remote-based mutexes

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!

This gem provides asynchronous indexing to Solr for the sunspot gem. It uses a pluggable model for the backing queue and provides support for ActiveRecord, DataMapper, and MongoDB out of the box.

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.

Extremaly fast, flexible and intuitive access control mechanism, powered by fast key value stores like Redis.

AcornCache is a Ruby HTTP proxy caching library that is lightweight, configurable and can be easily integrated with any Rack-based web application. AcornCache allows you to improve page load times and lighten the load on your server by allowing you to implement an in-memory cache shared by every client requesting a resource on your server.