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

HTTP::Cookie is a Ruby library to handle HTTP Cookies based on RFC 6265. It has with security, standards compliance and compatibility in mind, to behave just the same as today's major web browsers. It has builtin support for the legacy cookies.txt and the latest cookies.sqlite formats of Mozill...

This is a Domain Name manipulation library for Ruby. It can also be used for cookie domain validation based on the Public Suffix List.

Sprockets Rails integration

This is a wrapper library to bring Unicode Normalization Form support to Ruby/JRuby.

Cross-platform asynchronous I/O primitives for scalable network clients and servers. Inspired by the Java NIO API, but simplified for ease-of-use.

CocoaPods manages library dependencies for your Xcode project. You specify the dependencies for your project in one easy text file. CocoaPods resolves dependencies between libraries, fetches source code for the dependencies, and creates and maintains an Xcode workspace to build your project. Ul...

An XML toolkit for Ruby

We use this library at GitHub to detect blob languages, highlight code, ignore binary files, suppress generated files in diffs, and generate language breakdown graphs.

Crass is a pure Ruby CSS parser based on the CSS Syntax Level 3 spec.

Arel Really Exasperates Logicians Arel is a SQL AST manager for Ruby. It 1. Simplifies the generation of complex SQL queries 2. Adapts to various RDBMSes It is intended to be a framework framework; that is, you can build your own ORM with it, focusing on innovative object and collection modeli...

FSEvents API with Signals catching (without RubyCocoa)

GitLab Language detection

A Ruby wrapper for the OAuth 2.0 protocol built with a similar style to the original OAuth spec.

A Ruby wrapper for Linux inotify, using FFI

Generic connection pool for Ruby

Kaminari is a Scope & Engine based, clean, powerful, agnostic, customizable and sophisticated paginator for Rails 4+

ExecJS lets you run JavaScript code from Ruby.

Test your JavaScript without any framework dependencies, in any environment, and with a nice descriptive syntax. Jasmine for Ruby is deprecated. The direct replacment for the jasmine-core gem is the jasmine-core NPM package. If you are also using the jasmine gem, we recommend using the jasmine-b...

MessagePack is a binary-based efficient object serialization library. It enables to exchange structured objects between many languages like JSON. But unlike JSON, it is very fast and small.