Useful Ruby on Rails gems

ror_gems

gem 'haml-rails'    # simple and pretty template language
gem 'devise'        # authentication
gem 'cancan'        # authorization
gem 'formtastic'    # form builder, also use 'formtastic-bootstrap'
gem 'kaminari'      # pagination, analogs: 'will_paginate'
gem 'draper'        # use output decorators instead of helpers
gem 'paperclip'     # upload files, analogs: 'carrierwave'
gem 'rmagick'       # process images
gem 'letter_opener' # preview letters instead of sending
gem 'activeadmin'   # administrative panel
gem 'redis-rails'   # redis store for cache or sessions
gem 'sidekiq'       # background jobs, analogs: 'resque'
gem 'paper_trail'   # versioning of model's data

# debuging

gem 'better_errors'     # pretty error output
gem 'byebug'            # debug console
gem 'rails-footnotes'   # helpful stats
gem 'bullet'            # detect SQL N+1 problem 

# testing

gem 'faker'               # fake data generator
gem 'factory_girl_rails'  # fixtures
gem 'capybara'            # integration testing
gem 'database_cleaner'    # cleans database after tests

# more at https://www.ruby-toolbox.com