Isolate and automate your Rails validations.

Server side validations for ember.js framework, model agnostic

Internal validations library used by the Fanforce codebase.

Add controller time validation for media types

Additional validations for Active Model

Realtime remote form input validations delivered via websockets

ActiveValidators is a collection of ActiveModel/ActiveRecord validations

Simple model and validation mixins for RubyMotion

A gem/plugin for Rails 3+ that enables client-side validation using ActiveModel + HTML5

A Ruby wrapper for the World Wide Web Consortium’s online validation services.

Robust options validation for methods.

Phone number parsing, validation and formatting

Rails plugin that maps model validations to class names on form elements to integrate with Validatious.

Introspects your database string field maximum lengths and automatically defines length validations.

ActiveRecord Tableless Models provides a simple mixin for creating models that are not bound to the database. This approach is useful for taking advantage of the features of ActiveRecord such as validation, relationships, etc.

Includes a couple of core functions such as callbacks, timestamping, typecasting and lots of generic validation routines.

Regressor generates regression specs based on ActiveRecord models. Currently relations, validations, attributes, and database indexes are supported.

cucumber-api allows API JSON response validation and verification in BDD style.

Add a validation filter to your controller.

Machinery is a systems management toolkit for Linux. It supports configuration discovery, system validation, and service migration. It's based on the idea of a universal system description.