This Ruby library uses ANSI escape sequences to control the attributes of terminal output.

This package provides a common interface to multiple JSON libraries, including Oj, Yajl, the JSON gem (with C-extensions), the pure-Ruby JSON gem, NSJSONSerialization, gson.rb, JrJackson, and OkJson.

WEBrick is an HTTP server toolkit that can be configured as an HTTPS server, a proxy server, and a virtual-host server.

Slop provides a Ruby domain specific language for gathering options and parsing command line flags.

The httpclient ruby library provides functionality related to HTTP. Compared to the net/http library, httpclient also provides Cookie, multithreading and authentication (digest, NTLM) support.

Also provided is a httpclient command, which can perform HTTP requests either using arguments or with an interactive prompt.

With Serverspec, you can write RSpec tests for checking your servers are configured correctly.

Serverspec tests your servers’ actual state by executing command locally, via SSH, via WinRM, via Docker API and so on. So you don’t need to install any agent softwares on your servers and can use any configuration management tools, Puppet, Ansible, CFEngine, Itamae and so on.

But the true aim of Serverspec is to help refactoring infrastructure code.

Sinatra is a DSL for quickly creating web applications in Ruby with minimal effort.

ruby-hydra-minimal is a Ruby library for working with hyphenation patterns. It is a low-dependency variant of ruby-hydra.

Gettext is a GNU gettext-like program for Ruby. The catalog file (po-file) used is the same as that used by GNU gettext, allowing you to use GNU gettext tools for maintenance.

This gem contains the core algorithms and classes used for doing basic programming with RDF data, implemented in pure Ruby.

This library can be used as a module for fog or as standalone libvirt provider. fog is a Ruby cloud services library.

This gem provides tables support for Prawn.

Citrus is a parsing library for Ruby that combines the expressiveness of the language with the parsing expressions.

Notiffany is a Ruby wrapper library for notification libraries such as Libnotify.

Bond can autocomplete argument(s) to methods, uniquely completing per module, per method and per argument. Bond provides a configuration system and a DSL for creating custom completions and completion rules. Bond can also load completions that ship with gems. Bond is able to offer more than irb's completion since it uses the full line of input when completing as opposed to irb's last-word approach.

This package allows you to test FTP implementations in ruby. It is a minimal single-client FTP server that can be bound to any arbitrary port on localhost.

Thin is a Ruby web server that glues together 3 Ruby libraries:

• the Mongrel parser,

• Event Machine, a network I/O library with high scalability, performance and stability,

• Rack, a minimal interface between webservers and Ruby frameworks.

This package provides a collection of RuboCop cops to check for performance optimizations in Ruby code.

Lino provides an interface to run external commands. It provides an interface to add options as well as managing the standard input, output and error streams.

This package provides Rake tasks to generate and check a manifest file.

MIME detection by extension or content, using the freedesktop.org.xml shared-mime-info database.

This package provides a Ruby implementation of the Coveralls API.

The Listen gem listens to file modifications and notifies you about the changes.

fog is a Ruby cloud services library. This package provides shared classes and tests for fog providers and services.