Active Representer provides model objects for web applications by decorating objects.

This ActiveResource extension which integrates ActiveModel::Attributes for type casting and default values.

Monkey Patch to support ActiveModel::Dirty methods in ActiveResource

REST on Rails. Wrap your RESTful web app with Ruby classes and work with them like Active Record models.

Simple, dependable JSONRpc 2.0 Server library for Rails

This gem is created to cater the projects which do not require a backend/database, but still need all the niceties offered by the ActiveModel

ActiveModel session

Allow using a Shotgun site as a DB for Active Model objects.

A simple gem for easily using the state design pattern in Rails.

Provides subset validation for serialized arrays or sets in Active Record

Typed store for active records json columns (postgresql, mysql, sqlite)

Allow to store ActiveModel validations in ORM.

Validate commonly used attributes easily with ActiveValidation.

Contains validators for date and time values, type checking.

ActiveVector provide a way to use Vector data structure in Ruby

ActiveModel style WePay interface.

Activity Provider for store data of education in LRS (Learning Record Store) based on xAPI specification https://github.com/adlnet/xAPI-Spec/blob/master/xAPI.md

Activity Streams system by Fotonauts.

Actn.io DB

acts_as_api library adjusted to support sequel models