Capybara is an integration testing tool for rack based web applications. It simulates how a user would interact with a website

New Relic is a performance management system, developed by New Relic, Inc (http://www.newrelic.com). New Relic provides you with deep information about the performance of your web application as it runs in production. The New Relic Ruby agent is dual-purposed as a either a Gem or plugin, hosted ...

Shared classes and tests for fog providers and services.

software to fetch configuration from network devices and store them

RubyCritic is a tool that wraps around various static analysis gems to provide a quality report of your Ruby code.

Check the home page for more in-depth information.

An enterprise security extension for devise.

This library can be used as a module for `fog` or as standalone provider to use vSphere in applications.

write_xlsx is a gem to create a new file in the Excel 2007+ XLSX format.

Jekyll Picture Tag adds responsive images to your Jekyll static site. It automatically creates resized source images, is fully configurable, and covers all use cases, including art direction and resolution switching, with a little YAML configuration and a simple template tag.

Your Rails console, 1984 style

Simple Ruby rate limiting mechanism.

Omakase Ruby styling for Rails

Get suggestions to tune Ruby's garbage collector

Idempotent operations for Rails apps, built on top of ActiveJob.

Brings Common Table Expressions support to ActiveRecord and makes it super easy to build and chain complex CTE queries

Easily run queries on shard and replica databases.

puma+sinatra+haml webUI + REST API for oxidized

RuboCop configuration which has the same code style checking as official Ruby on Rails

Ruby-LLVM is a Ruby language binding to the LLVM compiler infrastructure library.