CLI tool to obtain certificates via ACME and update the matching TLSA records. The primary authentication method is http-01 via webroot for now, but dns-01 is supported too.

Ruby/NTLM HTTP provides NTLM authentication over http.

Oauth authentication for bombbomb.

A Ruby gem that provides OAuth 2.0 authentication and API client functionality for TradeStation's trading platform. Supports both production and sandbox environments.

Simple authentication for Rails

The email equivalent of has_secure_password for ActiveRecord.

A gem for rails that helps with basic database authentication.

An authentication and authorization system for Rails

A flexible authentication and authorization framework for Rack applications.

AlterEgo is a Ruby gem for integrating two-factor authentication into your web application.

An authentication bootstrapper for your Rails application.

Users, Authorization and Authentication for Isomorfeus.

The gem will handle adding API tokens to your user account, and handle the authentication of incoming requests.

Official Aqua.io API library client for ruby. Covers API authentication and methods for ICD-9 and ICD-10 code endpoints.

auth_api gem provides restful api for registration and authentication of users

A rails authentication and authorization engine that reduces clutter in your controllers and views. Includes aliased link_to and button_to helpers that return an empty string if the current user is not permitted to follow the link. ...

Authist is a Ruby on Rails plugin that provides a simple way to add role-based authorization to your application. It can easily be plugged into any user or group models in your application, and allows you to define a set of access types that roles can provide. Roles and users' participation in th...

Run your own Authentication provider!

Rack Middleware transposing the authenticated identifier for Soar SC

Merb Slice that provides user authentication