Mongo Followable adds following feature to mongoid/mongo_mapper

mongoid-encryptor encrypts and decrypts one or more fields in a Mongoid model.

Gem to add basic "follow" features if you're using rails3 with mongoid

Library for translating Mongoid documents, based on Globalize3 principles

Money datatype for Mongoid. Inspired by Ruby Money. Makes handling money simple. Stores the value in the db as cents. Currently handles USD.

Mongo Followable adds like/dislike feature to mongoid/mongo_mapper

mongo_odm is a flexible persistence module for any Ruby class to MongoDB.

A proxy server for MongoDB.

Ruby Daemon collects statistics via UDP packets, stores them in Mongo, and then views them via a user friendly Sintra app.

CRUD interface for Rails models with OpenAPI (Swagger) specification support and Swagger UI integration.

An Experimental Version of the squealer gem http://github.com/delitescere/squealer/

A Ruby DSL for exporting MongoDB to MySQL or PostgreSQL. You don't need to install both, just one. Use EXPORT_DBMS=[mysql|postgres] environment variable to specify the appropriate adapter.

Statistic and analysis in Ruby DSL, just as simple as SQL operations in ActiveRecord.

An engine for search-engine-optimized blog management.

C2 aspires to be a simple, drop in, Admin Portal + CMS for apps based on Rails 3 + Mongoid.

A simple, yet flexible solution to tracking changes made to objects in your database.

A Rails Engine to control and monitor Rails application from a web interface. It includes content capturing system, real-time traffic monitoring, and real-time performance monitoring. It is built to be flexible and customizable.

Tracks and logs events and sends notifications of events on Active Record models.

The Exception Engine logs your Rails exceptions in your mongodb database and provides a web interface to manage them

Exodus is a migration framework for MongoDb