Surikat is a web framework that revolves around GraphQL, offering a lot of ready-made functionality such as CRUD operations, automatic query generation, authentication and performance optimisations.

AuPair provides token-based authentication and versioning for Rails API applications.

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.

Authentication Middleware for Gollum Wiki

Rack middleware for transparent authentication with NTLM. This is a fork from lukefx/rack-ntlm on Github. This makes the Rack middleware a gem and uses net/ldap to search the user against an ActiveDirectory server. This is work in progress, so contributions are welcome.

Fluentd plugin that store data to be forwarded, and send these when client(input plugin) requests it, over HTTPS and authentication

Simple and modulable authentication gem

For authenticating against PAM (Pluggable Authentication Modules)

Authentication engine for Ruby on Rails

Make a connection to the prooflink connect api for single sign on authentication

Gem for Rails application - provides you list of online users (for authentication gem 'devise')

omniauth provider for Microsoft V2 Authentication

Merb plugin that provides authentication support

A simple rails engine to implement authentication using Facial recognition system

W3C Web Authentication API (a.k.a. WebAuthN / FIDO 2.0) RP library in Ruby

MYOB authentication strategy for OmniAuth

JWT authentication for Rails API's

Ember-auth is an authentication framework for ember.js. It is expected to work out of the box with rails + devise.

Authentication for Rails applications

Mozilla BrowserID/Persona authentication module that works with Rails 3.1+ and Devise 2.1+