RailsAdmin is a Rails engine that provides an easy-to-use interface for managing your data.

Draper adds an object-oriented layer of presentation logic to your Rails apps.

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

MongoMapper is a Object-Document Mapper for Ruby and Rails

PropertyWebBuilder lets you build great real estate websites fast.

Small library for adding service layer to Rails projects

Rails engine for Shopify applications.

Drape adds an object-oriented layer of presentation logic to your Rails apps.

Koalagator is an open source community calendaring platform

ActiveResource, but with a caching layer.

An open source, Ruby on Rails customer relationship management platform

Core functionality for GAKU Engine. See https://github.com/GAKUEngine/gaku

The default Rails front end for GAKU Engine, with web views etc.

Reduce your table width and migration overhead by moving non-indexed columns to a separate metadata column.

Octocore is the core framework of Octomatic Enterprise. It contains all the core models, tasks, actions etc for MongoDB

Systems monitoring tool

A really straightforward open source Ruby on Rails blog engine designed for integration with Refinery CMS.

Synamoid is Dynamoid just change only dependency and name to push to rubygem only nothing's mine.