Gem that adds devise based authentication to hobo-based applications

OAuth2 (Facebook Connect) authentication strategy for connecting to lds.org thru LDS Connect with Ruby / Sinatra / etc

Manages collecting of facebook authentication and provides helpers. It uses koala and is built for Rails 3.

Library utilizing IDCRL for Microsoft Windows Live ID authentication.

Locomotive plugin for adding basic authentication to pages of a site

Loginza - an interactive JavaScript widget provides visitors to your sites, a wide range of options for authentication through the accounts of common WEB-portals and services

this gem provides connectivity to the Whiplash API for authentication and REST requests.

Uploads lolcommits to a remote server, with optional key or HTTP based authentication.

Basic authentication plugin for Lokka.

Uploads lolcommits to a remote server, with optional key or HTTP based authentication.

authentication mechanism based on SSH keys

The goal of this gem is to provide token-based authentication for Rails (or Rails-like) web applications.

A gem providing HMAC based authentication for HTTP

A REST client for the UK Companies House API, including authentication

A mixin for Mongoid document models allowing for publishing them after authentication

Merb Slice adds quick DB'less OpenID authentication to your app

A super simple session-based authentication gem, for when you need to add basic admin capability to a single-user Rails app.

Generates Rails code implementing a model security and authentication system for your Rails app.

MojoAuth is a set of standard approaches to cross-app authentication based on HMAC.

Integrate Monk ID authentication and single sign-on for apps and websites on the server-side.