CommunityEngine is a free, open-source social network platform for Ruby on Rails applications. Drop it into your new or existing application, and you’ll instantly have all the features of a basic community site.

Calagator is an open source community calendaring platform

Calagator is an open source community calendaring platform

Add a blog to your Rails application in minutes with this mountable Rails Engine

LINES lets you manage your posts in a clear, consistent frontend. The gracefully slender editor keeps your editing simple and lets you just splash around in your ideas. Once you're happy, just hit publish and see your text, code examples, images, and links shine.

OpenConferenceWare is an open source web application for events and conferences. This customizable, general-purpose platform provides proposals, sessions, schedules, tracks and more.

Enable librarians, curators, and others who are responsible for digital collections to create attractive, feature-rich websites that feature these collections.

Spree Essential Blog is a blog plugin for Spree sites equipped with spree_essentials.

The smalruby-editor is a visual programming editor that can create aRuby script by combining individual blocks similar to Scratch. It can also enter the program as better than Scratch.

Almanac is the most elegant mountable blog engine that can be easily hooked up in the existing Rails application.

Redmine plugin for adding tag functionality

This is the basic module of Golden Cobra. It offers Devise, ActiveAdmin, an article module, a menu module and global settings for an CMS

Social Stream is a Ruby on Rails engine providing your application with social networking features and activity streams. This gem packages the basic functionality, along with basic actors (user, group) and activity objects (post and comments)

Run your own business.

CMS system built on fullstack

This gem contains the rails specific code for dealing with feeds, aggregations and recommendations. It is meant to work with the muck-raker gem.

Improved tag management for Administrate

A Ruby on Rails engine for running ticketing, CRM, and order management. See http://fracturedatlas.github.com/artfully_app/ for the reference implementation

Atreides is an engine providing a evented CMS following a KISS principle

Article/Blogging engine