Rack Middleware transposing the authenticated identifier for Soar SC

Merb Slice that provides user authentication

API wrapper for AuthAnvil Two Factor Authentication

Simple gem that allows you to automatically spec your controllers authentication checks.

The AuthLane Sinatra Extension allows simple User authentication with support for different User roles. It comes with Sinatra helpers for easy integration into routes.

An incredibly bare bones authentication library

Extension to authlogic-connect for Mail.ru authentication support

This generator can add powerful authentication and authorization to a clean Rails application with a single command. Configures a Rails application for use with the authlogic and declarative_authorization gems, and generates all code (migrations, models, controller methods, routes, roles, seeds,...

Automate basic authentication for your coding challenges

Client authentication for Authentic Apps

Monban - The authentication plugin for web api based on jwt

This is a simple gem to allow authentication against a RADIUS server.

This gem can manage user authentication on multiple LDAP directories that can reside either on same server or not.

Executes AWS Signature Version 4 Signing Process as explained at http://docs.aws.amazon.com/general/latest/gr/sigv4_signing.html. It calculates the signature token and provides HTTP headers with authentication data.

omniauth-azure-ad uses 'Peerialism authentication HUB' web site that manages token exchanges with the Azure ACS, encryption etc.

rack-auth-gitlabapi : provide GitLab API authentication for Rack middleware

Rails authentication

Simple authentication solution for any rails app.

A light weight Firebase access token validator whichutilizes HTTP caching to reduce network traffic whenvalidating against Google's X509 Certificates.

Gitkite is the Rails authentication engine for Google Identity Toolkit (gitkit). It provides all the endpoints and views necessary for gitkit.