state-machines/state_machines-audit_trail

A statesmanlike state machine library.

Adds support for creating state machines for attributes on any Ruby class

Track changes to your rails models

Automatic logging for Django FSM

AASM - State machines for Ruby classes (plain Ruby, ActiveRecord, Mongoid, NoBrainer, Dynamoid)

Audited (formerly acts_as_audited) is an ORM extension that logs all changes to your Rails models.

StateMachines Active Record Integration

Transition is a Golang state machine implementation

The extension for keeping an audit log of changes to your Ash resources.