Settings is a plugin that makes managing a table of global key, value pairs easy.

User interface for manage settings with rails-settings gem

UI interface for rails-settings-cached in active admin

It just makes sense to store mutable, site-wide, admin-level settings in the database. Right? A key-value table may be more flexible, but maybe we don't want to be flexible! If you truly want that flexibility: http://github.com/stephencelis/kvc

You've got a script. It's got some settings. Some settings are for this module, some are for that module. Most of them don't change. Except on your laptop, where the paths are different. Or when you're in production mode. Or when you're testing from the command line. "" So, Consigliere of mine, I think you should tell your Don what everyone knows. "" -- Don Corleone Configliere manage settings from many sources: static constants, simple config files, environment variables, commandline options, straight ruby. You don't have to predefine anything, but you can ask configliere to type-convert, require, document or password-obscure any of its fields. Modules can define config settings independently of each other and the main program.

Settings for your classes

Easy settings for your app

Onotole is a Rails project generator that you can upgrade. Use Onotole if you're in a rush to build something amazing or just want to test out some new technologes. You can choose more than 50 gems to add and get all of it with init settings and be free from init confings copy/paste

A lightweight singleton library for your Active Record models. It just makes sense to store mutable, site-wide, admin-level settings in the database. Right? A key-value table may be more flexible, but maybe we don't want to be flexible! If you truly want that flexibility: http://github.com/stephencelis/kvc

Setler is a Gem that lets one easily implement the "Feature Flags" pattern, or add settings to individual models. This is a cleanroom implementation of what the 'rails-settings' gem does. It's been forked all over the place, and my favorite version of it doesn't have any tests and doesn't work with settings associated with models.

Agent for the GC tuning webservice https://www.tunemygc.com - optimal settings for throughput and memory usage of Ruby applications

The Sensu settings library, loader and validator

Dependor is not a framework for Dependency Injection, but something thatt reduces duplication a little bit when doing manual dependency injection in settings like Rails apps.

Configus helps you easily manage environment specific settings

Create a Settings.bundle for your RubyMotion app. This allows your app to have a "global" settings entry in the Settings app.

Gem that provides an easy way to configure your app via ENV vars or yml files

Helpers, Sass mixins, JS shortcuts, workflow and Rails settings from Evil Martians

Allows max_attempts, destroy_failed_jobs?, reschedule_at, and max_run_time methods to be defined in your jobs to override default settings just like you're used to in delayed_job

This is the basic module of Golden Cobra. It offers Devise, ActiveAdmin, an article module, a menu module and global settings for an CMS

Create settings/contants for your Rails 3 app using yml key/value pairs