A Rake task investigates the application's models definition, then tells you unique validations that do not have DB indexes.

A simple, localizable EachValidator for URL fields in ActiveRecord 3.0.

This gem provides additional scopes for your Active:Record models within Ruby on Rails framework.

A bunch of useful modules to work with time/size constants/hashes

Rails ActiveModel gem to access Usergrid / Apigee App Services

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.

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

Allows you to easily format and validate phone numbers in any format you desire (sensible defaults provided).

Checks for valid hostname labels

A captcha verification approach for Rails apps, directly integrated into ActiveRecord’s validation mechanism and providing helpers for ActionController and ActionView.

Rails plugin that provides a validates_url_format_of method to ActiveRecord models. URLs are validated by regexp.

Log validation errors to the database for later inspection.

Easily track all the validation errors on your database so that you can analyse them.

Validation groups for ActiveRecord

Stores Vines user data in an SQL database.

This engine aims to provide an easy way to work with dynamic permissions.

An ORM framelet that fits on top of ActiveRecord to give you 'Data Mapper' semantics.

A pluggable webhook subscription system

WebpayRails is an easy solution for integrate Transbank Webpay in Rails applications.