crack provides really simple JSON and XML parsing, extracted from code in Merb and Rails.

Nokogiri (鋸) parses and searches XML/HTML, and features both CSS3 selector and XPath 1.0 support.

Arel is an SQL Abstract Syntax Tree (AST) manager for Ruby. It simplifies the generation of complex SQL queries and adapts to various relational database implementations.

yaml-lint will simply try to load the YAML file with the built-in Ruby yaml library.

Diffy provides a convenient way to generate a diff from two strings or files.

The mapping gem maps model objects based on their class to a given output model. It is useful for versioning external interfaces (e.g. JSON APIs) or processing structured data from one format to another.

This package provides a gem that calculates the exchange rate using published rates from open-exchange-rates. Compatible with the money gem.

Ruby i18n is an internationalization and localization solution for Ruby programs. It features translation and localization, interpolation of values to translations, pluralization, customizable transliteration to ASCII, flexible defaults, bulk lookup, lambdas as translation data, custom key/scope separator, custom exception handlers, and an extensible architecture with a swappable backend.

This package provides a command line interface for running for Rack applications.

Braintree provides resources and tools for developers to integrate Braintree's global payments platform.

Roda is a routing tree web toolkit, designed for building fast and maintainable web applications in ruby.

RJB is a bridge program that connects Ruby and Java via the Java Native Interface.

Net::HTTP::Persistent manages persistent HTTP connections using Net::HTTP, supporting reconnection and retry according to RFC 2616.

The rubyzip module provides ways to read from and create zip files.

AnyStyle is a very fast and smart parser for academic reference lists and bibliographies. AnyStyle uses powerful machine learning heuristics based on Conditional Random Fields and aims to make it easy to train the model with data that is relevant to your parsing needs.

This package provides the anystyle command-line utility. AnyStyle can also be used as a Ruby library or as a web application, though the later has not yet been packaged for Guix.

Unicode::DisplayWidth is a Ruby library which can determine the display width of strings in Ruby.

websocket-extensions provides a container for registering extension plugins.

This package provides a Jekyll plugin to generate an Atom feed of your Jekyll posts.

Niceogiri provides wrappers and helpers for XML manipulation using Nokogiri.

This unmaintained package provides a Prawn extension that allows including other Portable Document Format (PDF) documents as background or combining several PDF documents into one. This functionality used to be part of Prawn itself, but was extracted from Prawn 0.15.0 because of its many longstanding issues.

Cane fails your build if code quality thresholds are not met.

Minima is a one-size-fits-all Jekyll theme for writers. It's Jekyll's default (and first) theme. It's what you get when you run jekyll new.

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.

This library provides a number of PDF::Reader based tools for use in testing PDF output. Presently, the primary purpose of this tool is to support the tests found in Prawn, a pure Ruby PDF generation library.