Es muy simple y para aprender mas marco, yo construyo este marco como una gema.

JSON API(jsonapi.org) serializer that works with rails and can be used to serialize any kind of ruby objects

JpAddress is simple japan-zipcode-address-search API. You can load master-data from JapanPost and mount address-search-api to your rails application.

JIS X 0402 (Identification code for cities, towns and villages) for Rails.

jpnstacapi provides easier way to access Japanese National Statistics Center API.

transfer address to japan postal customercode.

A Rails plugin for railway data in Japan.

Super lightweight (~600 bytes) jQuery plugin to enable swipe gestures for Bootstrap 3 carousels on iOS and Android.

Make jQuery Cookie plugin available in the Rails asset pipeline.

A Rails Gem to include the JQuery Plugin for CountTo

Adapter for https://github.com/coop182/jquery.dfp.js

jQuery file upload by Blueimp for Rails

JQuery Plugin to auto-resize iFrames from same domain.

This gem provides jQuery Mockjax support in Rspec integration testing with Capybara

Integrates jquery-raty into the Rails 3 asset pipeline.

Integrates JQuery ScrollToFixed to Rails Sprockets

A dynamic grid system with drag and drop functionality for Ruby On Rails.

Drag&Drop GUI, inline node editing and new node creating. Ready for Rails 4

The jquery.spinner.js and jquery.spinner.css files.

Bunch of jquery event handlers for dealing with standard Rails json responses.