Mongoid has an extensive ecosystem of libraries integrating with or built on top of Mongoid, are listed below.
Workarea is an enterprise-grade Ruby on Rails commerce platform that uses Mongoid.
A tree structure for Mongoid documents using the materialized path pattern.
A little random, unique token generator for Mongoid documents.
Easy maintenance of collections of processed data in MongoDB with the Mongoid ODM.
Document-level locking for MongoDB via Mongoid.
A simple and beautiful logger library for MongoDB in your Ruby/Rails app.
Simple full text search for Mongoid.
Full-text search using n-gram matching for the Mongoid ODM.
Mongoid Support for the Carrierwave file uploads library.
RSpec matchers and macros for Mongoid applications.
RailsAdmin supports Mongoid out of the box.
ActiveAdmin hacks to support Mongoid.
Multi-user non-linear history tracking, auditing, undo, redo for mongoid.
Mongoid backend for delayed_job.
A Rails-compatible session store for Mongoid.