An advance email validator. Checks format, MX record existence for email domain, and SMTP address validation.

HasPhoneNumber makes validations for US phone numbers in ActiveRecord models easy.

Validations for ruby objects

A simple gem to do validation

Simple DSL for datatype validation for basic data types.Inspired from GRPC DSL. Since ruby is dynamic language, datatype validator helps to reduce runtime errors by validating structure before processing

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.

Framecurve parser, validation and interpolation

Apply ActiveModel validations at a model instance level

NIS validation for ActiveModel

Some extra sensible validations

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

Auto generating ActiveModel validations for hashes

Provides Rails model services (such as validations) to non-ActiveRecord descendants.

adds a uniqueness validator for globalize3 translated models

Little gem that take advantage of Roo gem and Rails ActiveModel validation methods to read and validate the content of a spreadsheet

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.