Pattern for assign instance variables in controllers for use in views, etc.

Conversations is a messaging system that enables users of devise-based Rails applications to exchanges messages with any other user. It supports conversations with multiple participants.

You can copy data from rails staging environment to production. You can even copy 'Papercliped' model with its attachments.

Core purpose is to allow you to re use the models and there relationships and concerns with various other apps.

Cornerstone provides customer care capabilities to an existing application by adding things like discussions and a knowledge base.

Text correction using words and phrases dictionaries.

Simple cart-checkout for your store

Extends couchrest document and adds simple views and document management.

Rails 3.1 engine which adds the ability to build roles from features you create.

A rails plugin to abstract CRUD api in controller

Easy way to authentication and authorization

This ActiveRecord plugin add very basic support custom associations, without any syntactic sugar (yet).

Reporting application

A simple mylist that can contain some products.

Dallas provides a DSL that allows you to define and create notifications for any kind of target. Currently it supports only create and update actions of a resource and only email notifications.

Generates sign-in, sign-out, create account, forgot password, and account confirmation systems (via email) for Rails apps. It'll get your prototype up and running fast. It's pretty much Devise for beginners.

A database anonymizer for Rails 4+

Rail Wizard - Easily create sequence of forms leading a visitor through a series of defined steps - ideal for questionnaires, application forms, checkouts, configurations, collecting data as they go. Package containing state engine, form based journey planning and execution

Rails 5 Engine to give users their own calendars of events.

The DceLti engine simplifies integrating LTI authentication for Rails apps via the IMS::LTI gem.