it uses the standard method like spree_i18n

As spree doesn't update line items price when products price changes, this extension do it.

Add support for Pagseguro checkout as a payment method.

Adds sale pricing functionality to Spree Commerce. It enables timed sale planning for different currencies.

Provides the feature for a Spree store to allow user to club payment methods to pay for the order

Notifies when stock levels are low or item goes out of stock

Implements diverse functions in order to enable the use of services from Brazil's Correios in Spree Commerce

Restore show_zero_stock_products functionality in Spree 2.0+

This gem allows you to build forms for user submission and can send email notifications when a form is filled out.

Leveraging Doorkeeper as single-sign-on OAuth server. To provide true single-sign-OUT, every request on an OAuth client app is verified with the SSO server.

State of the Nation makes modeling object history easy.

Storey aims to simplify the implementation of managing a multi-tenant application.

Sunrise is a Open Source CMS

Provides base fuctionality (models, DSL) for AR synchronization with external resources (apis, services etc)

Description of ThinkFeelDoEngine.

Rails engine client for the Aeolus Image Factory cross-cloud virtual machine image builder.

Set of time, date, weekday related methods.

Manage delta indexes via Sidekiq for Thinking Sphinx

Uploadbox makes easy to manage files in your Rails application.

#Crowdsourcing management system for #RubyOnRails: http://bit.ly/voluntary-0-7-1