Brazilian zipcode validations for ActiveRecord, integrated with correios-cep gem.

ActiveRecord model validation against stopforumspam.com (Rails 3)

IAP and IAB receipt validation module.

A rails plugin to set the digested value before validation and validate uniqueness.

W3C Validators is a Ruby wrapper for the World Wide Web Consortium's online validation services.

Defined hashlike objects, with validations. For simple schema definitions and checking they're followed

WIP!!! escher sign and validation for faraday http rest client

Framecurve parser, validation and interpolation

ActiveRecord: Simple filtering for html as validation.

Apply ActiveModel validations at a model instance level

Easily add Judge client side validation to your Formtastic forms.

Built for Developers. Ideal for MVPs, product ideation and validation.

NIS validation for ActiveModel

Some extra sensible validations

A very simple wrapper for the PostCodeAnywhere Bank Account Validation API.

Provides an easy way to add model-based validations to excel files.

This gem wraps the guards.js jQuery validation library as a Rails asset gem.

Make it easy to use handles (callsigns/monikers/usernames) in URLs, even if they might be blank. Provides sensible validations and a find_by_id_or_handle method.

An api to run sequential checks like 'ActiveModel::Validations' do, but with generic messages instead of errors. See more info at https://www.rubydoc.info/gems/verifly/0.3.1.0

Password hashing and validation using OpenSSL::PKCS5::pbkdf2_hmac for the hash and SecureRandom.base64 for the salt. Digest defaults to SHA1, but can be set to any digest (eg SHA256) supported by your systems OpenSSL lib.