Sprockets is a Rack-based asset packaging system that concatenates and serves JavaScript, CoffeeScript, CSS, Sass, and SCSS.

Ruby/ProgressBar is an extremely flexible text progress bar library for Ruby. The output can be customized with a flexible formatting system including: percentage, bars of various formats, elapsed time and estimated time remaining.

factory_girl provides a framework and DSL for defining and using factories - less error-prone, more explicit, and all-around easier to work with than fixtures.

Easy upload management for ActiveRecord

Upload files in your Ruby applications, map them to a range of ORMs, store them on different backends.

Fluentd is an open source data collector designed to scale and simplify log management. It can collect, process and ship many kinds of data in near real-time.

ActiveModel::Serializers allows you to generate your JSON in an object-oriented and convention-driven manner.

Parallel tests across CI server nodes based on each test file's time execution. It generates a test time execution report and uses it for future test runs.

Doorkeeper is an OAuth 2 provider for Rails and Grape.

A rack middleware for throttling and blocking abusive requests

Amazon S3 output plugin for Fluentd event collector

SAML Ruby toolkit. Add SAML support to your Ruby software using this library

Doorkeeper is an OAuth 2 provider for Rails.

Reconnaissance tool for GitHub organizations

Works for both HOTP and TOTP, and includes QR Code provisioning

When a Cucumber step fails, it is useful to create a screenshot image and HTML file of the current page

An unobtrusive ruby authentication library based on ActiveRecord.

A client library for the Kafka distributed commit log.

This "acts_as" extension provides the capabilities for sorting and reordering a number of objects in a list. The class that has this specified needs to have a "position" column defined as an integer on the mapped database table.

xlsx spreadsheet generation with charts, images, automated column width, customizable styles and full schema validation. Axlsx helps you create beautiful Office Open XML Spreadsheet documents ( Excel, Google Spreadsheets, Numbers, LibreOffice) without having to understand the entire ECMA specification. Check out the README for some examples of how easy it is. Best of all, you can validate your xlsx file before serialization so you know for sure that anything generated is going to load on your client's machine.