lets the User model in most authentication frameworks know who is the current user

Add authentication to applications and secure services with Keycloak

An extension of Authlogic to add LDAP authentication.

Integrates with your authentication solution to craft a personalized user notification platform.

LDAP authentication for humans

Rails API Auth is a Rails Engine that implements the "Resource Owner Password Credentials Grant" OAuth 2.0 flow as well as Facebook authentication for API projects.

The ruby-jss gem provides native ruby access to the REST APIs of Jamf Pro, an enterprise/education tool for managing Apple devices, from jamf.com. The Jamf module provides access to both the 'Classic' API and the more modern 'Jamf Pro' API. Jamf Pro objects are implemented as classes and can inte...

basic helpers and authentication methods for using warden with padrino also providing some hooks into Rack::Flash

Proof provides an easy-to-use JWT-based authentication system.

OpenID authentication module for Devise using Rack::OpenID

The devise-api gem is a convenient way to add authentication to your Ruby on Rails application using the devise gem. It provides support for access tokens and refresh tokens, which allow you to authenticate API requests and keep the user's session active for a longer period of time on the client ...

Devise based user authentication for AlchemyCMS.

The spark_api gem handles most of the boilerplate for communicating with the Spark API rest services, including authentication and request parsing.

ActiveGraph integration with the Devise authentication framework

Rails-API authentication solution based on JWT and inspired by Devise.

Neo4j integration with the Devise authentication framework

A Devise extension to use passkeys instead of passwords for authentication, using warden-webauthn

Allows applications using Train to speak to AWS; handles authentication, cacheing, and SDK dependency management.

Provides all the protocol you need in order to do authentication on your rack application. The implementation specifics can be found in http://github.com/cyx/shield-contrib

Delicious HMAC Digest(if) authentication and AES-128-CBC encryption