Ruby OpenID Test Server (ROTS) provides a basic OpenID server made in top of the Rack gem. With this small server, you can make dummy OpenID request for testing purposes, the success of the response will depend on a parameter given on the URL of the authentication request.

Mysql2::AwsRdsIam is an extension of mysql2 gem that adds support of IAM authentication when connecting to MySQL in Amazon RDS.

Token authentication

OAuth 2 authentication with the Azure ActiveDirectory V3 API.

This is simply the best CMS in town. User authentication, widgets, slideshows, easy UI with drag and drop, publishing system, versioning, etc.

A Simple Authentication Server

An authentication client for the Audiosocket API.

Merb authentication gem

A wrapper around Ruby's net-ldap library to ease authentication and record finding

A gem for Autodesk 2-phase authentication service.

Re-usable Devise-based authentication mountable engine

Authentication engine.

Access token for client-side and API authentication.

A Ruby middleware implementation for the L402 protocol, leveraging macaroons and the Lightning Network for secure authentication and payments.

A Ruby client for interacting with Keenetic router REST API. Supports authentication, device management, system monitoring, and network interfaces.

A gem to work with mobile fingerprint or face biometric authentication

Gem in a box with basic HTTP authentication and forced SSL, designed for use on Heroku or other cloud-based hosting services

CAS Authentication via Rack Middleware

Session-oriented authentication and account management system for Ruby on Rails and PostgreSQL

A library for doing SASL based authentication mechanisms