jiafuguang

acts_as_tree

ActsAsTree gem for rails 3

by_star

Lets you find ActiveRecord objects by year, month, fortnight, week and more!

carrierwave

Classier solution for file uploads for Rails, Sinatra and other Ruby web frameworks

client_side_validations

ClientSideValidations for Ruby on Rails

delayed_job

Database based asynchronous priority queue system -- Extracted from Shopify

devise

Flexible authentication solution for Rails with Warden.

highcharts-bootstrap

highcharts-bootstrap

jquery-dropdown

Bootstrap-style dropdowns with some added features and no dependencies.

kaminari

A Scope & Engine based, clean, powerful, customizable and sophisticated paginator for Rails 3 and 4

lazy_high_charts

Easily displaying Highcharts graphs with gem style. support rails 2.x/3.x

paperclip

Easy file attachment management for ActiveRecord

rails_best_practices

a code metric tool for rails projects

redis-objects

Map Redis types directly to Ruby objects

seed-fu

Advanced seed data handling for Rails, combining the best practices of several methods together.

settingslogic

A simple and straightforward settings solution that uses an ERB enabled YAML file and a singleton design pattern.

simple_captcha

simple_form

Forms made easy for Rails! It's tied to a simple DSL, with no opinion on markup.

spreadsheet

The Ruby Spreadsheet by ywesee GmbH

thinking-sphinx

Sphinx plugin for ActiveRecord/Rails

twitter-bootstrap-rails

Twitter Bootstrap for Rails 3.1 Asset Pipeline (Updated to Bootstrap 2)

whenever

Cron jobs in Ruby

wice_grid

A Rails grid plugin to create grids with sorting, pagination, and (automatically generated) filters