The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web. http://getbootstrap.com

Rails observer (removed from core in Rails 4.0)

ActiveInteraction manages application-specific business logic. It is an implementation of what are called service objects, interactors, or the command pattern. No matter what you call it, its built to work seamlessly with Rails.

Build reactive applications with the Rails tooling you already know and love.

The default_value_for plugin allows one to define default values for ActiveRecord models in a declarative manner

jQuery File Upload by Sebastian Tschan integrated for Rails 3.1+ Asset Pipeline

Simple (but safe) token authentication for Rails apps or API with Devise.

Client library for easily using the Cloudinary service

Log in as another user in Rails

Deliver assets for Rails.

GraphQL.js integration for Rails

jquery datatables for rails

Simple (but safe) token authentication for Rails apps or API with Devise.

Create plain old Ruby models without reinventing the wheel.

Caxlsx_Rails provides an Caxlsx renderer so you can move all your spreadsheet code from your controller into view files. Partials are supported so you can organize any code into reusable chunks (e.g. cover sheets, common styling, etc.) You can use it with acts_as_caxlsx, placing the to_xlsx call ...

Alchemy is a powerful, userfriendly and flexible Rails CMS.

The dynamic stylesheet language for the Rails asset pipeline. Allows other gems to extend Less load path.

Attach comments to your ActiveRecord queries.

lol_dba is a small package of rake tasks that scan your application models and displays a list of columns that probably should be indexed. Also, it can generate .sql migration scripts.

Permitted and required parameters for Action Pack