Popular Gems

Blog Engines

Octopress
Publify

A/B Testing

Split
Vanity

PDF Processing

pdf-reader

Background Jobs

Resque
Sidekiq

E-Mail Preview

MailCatcher
Letter Opener

E-Mail Processing

Griddler
Mailman

PDF Generation

Prawn
Wicked pdf

Browser Testing

Capybara
Selenium-Webdriver

Rails Fixture Replacement

Factory Girl

Time Warping

Timecop

CLI Option Parsers

Highline
Slop

Scheduling

Whenever
Rufus-scheduler

Code Metrics

SimpleCov
Rubocop
Rails best practices
reek

Benchmarking

MethodProfiler
BenchPress

Gem Creation

Hoe

Configuration Management

Dotenv
Dotenv-rails
Figaro