Devise module using the Facebook Graph API for authentication.

Generate an authentication token to pass to the Sinch Javascript SDK. Once authenticated, you can use the Sinch Javascript SDK to make browser-browser calls, browser-phone calls, and send instant messages.

This gem is to create and get data for a central authentication server.

Token-based authentication for your Rails API.

This is the unofficial API rubygem to secure-pass.net online secure authentication and authorization platform.

Windows Azure Active Directory authentication client library

SMS Authentication

Provides a thin wrapper around the excellent ruby-openid gem from JanRan. gem version is unofficial, github fork of rails's by moro

A lightweight authentication extension for Sinatra with PostgreSQL -- longer description

Sinatra extension to add authentication against a given active directory

add OAuth2 authentication to rails3 application

Tools for interacting with Active directory. Geared towards user authentication against active directory, to be used with RequestRefinery

Apppend rows to a Google Sheets spreadsheet. Uses Google Sheets API v4 with server-to-server authentication

HTTP dialog for the Acenda API with the oAuth2 authentication.

Coming Soon! Signage is here to provide authentication services to your roda and sequel based applications. Signage uses Warden.

HubIdentity is an authentication service which features various authentication methods for an applications users.

open_id_authentication provides a thin wrapper around the excellent rack-openid gem.

Time Based OTP/rfc6238 compatible authentication for Devise with Devise 4.2 and Rails 5 compatibility. Drop-in replacement for devise-otp.

RubyACL provides a set of classes and interfaces for handling authentication via almost any type of ACL

Provides low-level authentication based on ROM. Provides several plugins in order to lockdown accounts on failed authentication and saving events for each authentication attempt.