How to: Configuration
* [AnywayConfig](https://github.com/palkan/anyway_config) - Configuration library for Ruby gems and applications, supporting multiple sources (yml, secrets) and environments.
* [Chamber](https://github.com/thekompanee/chamber) - Surprisingly customizable convention-based approach to managing your app's configuration.
* [Configatron](https://github.com/markbates/configatron) - Simple and feature rich configuration system for Ruby apps.
* [Configus](https://github.com/kaize/configus) - Helps you easily manage environment specific settings.
* [dotenv](https://github.com/bkeepers/dotenv) - Loads environment variables from `.env`.
* [Econfig](https://github.com/elabs/econfig) - Flexible configuration for Rails applications.
* [ENVied](https://github.com/eval/envied) - ensure presence and type of your app's ENV-variables
* [Envyable](https://github.com/philnash/envyable) - The simplest YAML to ENV config loader.
* [Figaro](https://github.com/laserlemon/figaro) - Simple, Heroku-friendly Rails app configuration using `ENV` and a single YAML file.
* [Global](https://github.com/railsware/global) - Provides accessor methods for your configuration data.
* [RailsConfig](https://github.com/railsconfig/config) - Multi-environment yaml settings for Rails3.
* [Sail](https://github.com/vinistock/sail) - A lightweight Rails engine that brings an admin panel for managing configuration settings on a live Rails app.