Management of multiple databases.

Once you provide to a MultiRenderer instance the data it needs in each partial you are rendering in your view, the instance will render the given partial with it's local variables. This is usefull if you have a big view on your project, and you are rendering multiple arrays. Having all your iterations running on your controller can help you to detect a bottle neck that is causing your web page to run slow.

Advanced seed data handling for Rails, make it able to separate seeds.rb

Multi-Step is a Rails engine for easily creating multi step forms (i.e. form wizard)

Multitenant push helps to integrate pushmeup push notifications with milia tenancy gem.

A drag-and-drop multi-streaming uploader that uses XHR level 2 and the drag-drop JS API (and no Flash!).

Multiupload-uploadify is a gem for multiupload using the uploadify plugin

Support multiple versions for Rails view.

API for editing content on mumuki

Teacher tools for Mumuki

The core of Munificent, a game-bundle fundraising platform.

The admin section of Munificent

Optimize rails's expensive action with cache through Cache

Gem allows to chage locale through routes

Provide snapshot testing utilities for Rails views

For organizations that want to market a gem in style, Museum uses APIs to provide you with an ever-fresh marketing site for your gems.

Musicbrainz.org API Ruby Implementation

Also support for simple_form gem included

A controller extension for cancan.

Mutations are an elegant implementation of the Command and ServiceObject pattern in Ruby on Rails projects. This gem extends Rails generators to include a mutation generator.