ActiveModel

ActiveInteractionAaronLasseigne/active_interaction

A service object framework for Rails that encapsulates business logic with input validation and type safety.

validates_timelinessadzap/validates_timeliness

A Rails plugin for comprehensive date, time, and datetime validation with timezone handling and custom format support.

MailFormheartcombo/mail_form

A Rails gem for sending emails directly from forms with built-in validations, I18n, attachments, and request information.

ruby-trellojeremytregunna/ruby-trello

A Ruby client library for interacting with the Trello API, enabling programmatic management of boards, cards, lists, and members.

transitionstroessner/transitions

A Ruby state machine implementation extracted from ActiveModel, providing event-driven state transitions with callbacks.

Acts_As_Apifabrik42/acts_as_api

A Ruby library for easily defining and rendering JSON/XML API responses from Rails models.