Example of creating a Ruby Gem for RailsCasts episode #301

Verify URLs confirm to expected patterns. Ruby port of Jesse Pollak's Urlmatch

Simple gem to follow redirects to resolve the destination of a URL. Caches results sometimes.

A simple, localizable ActiveModel::EachValidator for URL fields. Supports format validation as well as optional network reachability checks via HEAD (or any other HTTP verb) requests.

URL validator with normalize URL from different charset

Utility methods to normalize and validate URNs

Simplify working with US bank holidays.

US Core Inferno tests

Random HTTP User-Agent string generator

In few cases random HTTP User-Agent strings are required that are generated by this gem.

Low-level gem to access Usergrid / Apigee App Services

Includes functionality for site-specific registration and third-party authentication strategies such as social networks (Facebook, Twitter and Linkedin) and freemail providers (Yahoo, Windows Live and Gmail) with support for external database authentication.

Generates username suggestions for users

user_preference is a small library for setting and getting categorized user preferences. Supports both binary and multivalue preferences and default values.

A lightweight UTF8-aware String class meant for use with Ruby 1.8

Helps using uuid everywhere in routes instead of id for ActiveRecord models.

Generate UUID(rfc4122) version 3(based on md5) or version 5(based on sha-1).

UUID "version 6" implementation in Ruby

Vagrant plugin for automagically managing guest DNS

A Vagrant plugin to add Berkshelf integration to the Chef provisioners