A good, simple, solid tagging extension for ActiveRecord

An adapter for using Mailgun with Rails and Action Mailer

Matestack provides a collection of open source gems made for Ruby on Rails developers. Matestack enables you to craft interactive web UIs without JavaScript in pure Ruby with minimum effort. UI code becomes a native and fun part of your Rails app.

Transparent multi-tenanting for web applications based on Rails and Devise

A pure Mongoid/Moped implementation of the MongoDB GridFS specification

Rails gem for dynamically adding and removing nested has_many association fields in a form. Uses jQuery and supports multiple nesting levels. Requires Ruby 1.9+ and the asset pipeline.

ViewComponents for Polaris Design System

Rails integration for qu

Import functionality for Rails Admin

Rails_Admin FLAT theme overhaul

Common libraries for RedmineUP plugins (www.redmineup.com) for Redmine. Required Redmine from http://redmine.org

Garage extends your RESTful, Hypermedia APIs as a Platform

Adds ActiveRecord validations that prevent overlapping date/time ranges — bookings, reservations, meetings, shifts. One SQL query; supports scoping and open-ended ranges

Extension to Delayed Job to enable workers to scale up when needed

Rich text editor for Active Admin using wysihtml5.

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

Bootstrappers is the base Rails application using Bootstrap template and other goodies.

Convenient Rails support for Cells.

Get a better understanding of your application performance and behavior (SQL queries, jobs, cache, routes, logs, etc)

Ensures consistent output of db/schema.rb despite local differences in the database