Provides a Result class for more elegant, exception-free error handling. Especially useful for processing input that could be invalid for many different reasons.

Unforgettable tracks which tasks it has run previously, and which tasks still need to be invoked.

Common resources for nobe projects like countries, states, cities, people, etc.

A unified way to get settings from different sources.

Generate a unique, random token for ActiveRecord models.

Check uniqueness across models

Easily set ActiveRecord attributes to auto-generate as unique values from a given proc.

A Rails validator for uniqueness by date.

ActiveRecord, MongoMapper and general tools for generating unique values e.g. api keys and tokens.

This extension creates values which can be used for invoice numbers, personnel numbers and the like.

A Ruby gem that helps the user implement a checkout system by supplying only the promotional rules

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

Make your model uniq and identifiable through a readable name.

Rails validators for: date, date_time, ip address, mac address

gem install universe-db

The Locode gem gives you the ability to lookup UN/LOCODE codes.

Unreliable helps uncover bugs in Rails apps that rely on ambiguous database ordering. Installing it makes both your app and your test suite more robust.

Untied Consumer Synchronizer.

A ActiveRecord backend for Untied Consumer Sync.