Signup or login using Paypal's Authorization or Permissions api's

Solution that eliminates the tight coupling between user identity/authentication and application functional authorization

Simple wrapper for JSON api provided by indeed. Original documentation at: http://www.indeed.com/jsp/apiinfo.jsp (Require authorization) Support search jobs API 2.0 and get jobs API

Granity is a flexible, caching-friendly authorization engine that provides fine-grained access control for Ruby on Rails applications

A Ruby authorization library

A simple gem for authorization and session management in Rails.

SAML 2.0 is an XML-based protocol that uses security tokens containing assertions to pass information about a principal (usually an end user) between a SAML authority, that is, an identity provider, and a SAML consumer, that is, a service provider. SAML 2.0 enables web-based authentication and a...

AuthorizedPersona is a rails implementation of Betterment's Persona Centric Authorization pattern

Minimalistic authorization focused on APIs

Flexible, configurable authorization system for ActiveRecord and an access control DSL for ActionController.

Parse and build Accept, Accept-Language, Accept-Encoding, Authorization, Cache-Control, Content-Type, Cookie, Link, CORS, Forwarded, and Via HTTP headers. Includes content negotiation and security header generation.

An opinionated almost-turnkey solution for managing authorization in Rails

Akamai-EdgeAuth is Akamai Edge Authorization Token for Ruby 2.0+

An authorization library that supports access control models like ACL, RBAC, ABAC in Ruby

This is a basic Rails engine utilizing Authlogic, CanCan and Easy Roles to create a starting point for simple Rails-based applications that need authentication and authorization.

The official SoundCloud API wrapper. It provides simple methods to handle authorization and to execute HTTP calls.

Rack middleware for using the Authorization header with token authentication

courtesy - Wikipedia: Maker-checker (or Maker and Checker, or 4-Eyes) is one of the central principles of authorization in the information systems of financial organizations.The principle of maker and checker means that for each transaction, there must be at least two individuals necessary for it...

A Rails engine for providing OpenID Connect authorization.

Consent permission based authorization