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Validation for Dutch bank account numbers, Citizen Service Numbers (BSN) and Payment reference

Email Verification that’s astonishingly easy and low-cost. See https://emailable.com for details.

API client for Email Octopus

ActiveModel validator for emojis, powered by the unicode-emoji gem, to ensure your Models do not contain characters you may not be able to handle

Encore provides serializers and persisters to build JSON API-compliant Web services with Ruby on Rails.

Entasis provides a few useful methods for building a basic class. Handy for models without a database.

Enum machine is a library for defining enums and setting state machines for attributes in ActiveRecord models and plain Ruby classes.

Elasticity provides a higher level abstraction on top of [elasticsearch-ruby](https://github.com/elasticsearch/elasticsearch-ruby) gem

Make your Ruby objects searchable with Elasticsearch.

Provides an easy-to-use ruby interface into the ExactTarget SOAP API, using the Savon client.

Explicit parameters validation and casting for Rails APIs

Sign in with Exvo account

Facturación Electrónica de Costa Rica

E-Mail validator for block services like mailinator.com, dropmail.me, etc. during new user registration.

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A ruby client for the foscam SDK.

Decouple your forms from your domain models

Client library to interface with Smarthome features of your FritzBox

Elasticsearch integrations for indexing git repositories.