This gem provides a set of wrappers designed to make it easy to work with the Google Data APIs. This fork enables OAuth authentication

Set up basic authentication and session management with dis gem

Well rounded authenticication system for use with authlogic.

Client library for the Central Authentication Service (CAS) protocol, modified to work with Indiana University's CAS server.

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

add authentication to your website - in 1 minute or less.

Library utilizing IDCRL for Microsoft Windows Live ID authentication.

Locomotive plugin for adding basic authentication to pages of a site

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

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

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.

LondonCab Authentication Client

A Gem for simplifying OpenId Authentication

Rails 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

Mori is a lightweight module based authentication platform. Mori uses Warden for session management, and is intended to be easy to overwrite, and configurable.