ActiveModel::Caching is a versatile gem for managing structured, temporary data using a caching backend, typically Rails cache for Rails applications. This gem provides an easy-to-use API for storing, retrieving, and manipulating data structures like scalars, lists, and JSON, making it simple to handle transient data without adding extra dependencies.

ActiveModelChangeset provides a lightweight changeset abstraction for Ruby on Rails applications. It combines type casting, attribute normalization, validation and diff calculation into a single object, enabling safe and explicit create/update operations with patch semantics. The gem is designed for service objects and APIs, allowing developers to whitelist attributes, apply transformations, validate input and update models using only changed values, without relying on ActiveRecord callbacks or controllers.

CSV Validator for Active Model

Builds a tree of errors instead of the 1-dimension one generated by ActiveMode::Base#errors.messages.

Serializing models to a single string makes it easy to pass references around.

Interdependent model validations

A gem that provides logging functionality for ActiveRecord models, storing logs in a separate table with support for log chains, metadata, and different visibility levels.

Build a hash based on active record attributes.

Adds in-memory persistence to ActiveModel models

ActiveModel::Unvalidate provides a clean api for removing existing validations from models

An ActiveModel extension for more expressive validations reflection

Active Model Serializer with versioning

Monitor application status and health in a sane way Rails-y.

ActiveNetsuite to Netsuite is what ActiveRecord to RDBMS.

Simplifies sending notifications to your end users through multiple channels

Notify message through webhooks.

Simple null objects in Active Record

Simple OOP-ish tools for Rails

ActiveWorkflow provides durable, idempotent workflow orchestration built on Rails Active Job. It supports sync and async steps, retries with backoff, signals, compensations, and pluggable persistence stores.

ActivePayment is an abstraction layer for different Payment-Interfaces (XML, JSON)