This gem is useful when you work with `paranoia` + `devise` gems etc, to prevent duplication creation (or unique index errors)

This validator allows you to verify nested models created with nested forms to validate the uniqueness of an attribute, More details in http://github.com/evedovelli/unique_nested_validator

Unite provides extensions to your objects to support values with units

Unity provides extensions to your objects to support values with units

A Rails adaptor that encapsulate measurements and their units in Ruby on Rails.

A minimal endpoint for driving server-side validations from a remote UI

Provides the Consumer part of the Untied gem.

A UOB Payroll File Generator

A sustainable architecture for Ruby on Rails.

Library for validating urls in Rails

URI validation for ActiveModel

Validate the url format of an attribute.

A module that helps you to implement the Use Case design pattern

validates that username is not included in reserved list.

Usine (french word for factory) is a wrapper around factory_girl for Trailblazer’s operations.

UUID attribute for ActiveRecord

uuid_v7 enables UUID V7 as primary keys in Rails, optimized for Mysql and Sqlite, with efficient migration and integration features.

UUID Validator for ActiveModel

Provides a set of additional Git commands to help developers when working with Pivotal Tracker

Rails 3 awesome custom validators