Metaclass is a Ruby library adding a metaclass method to all Ruby objects.

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

Colorator is a Ruby gem that helps you colorize your text for the terminal.

Mercenary is a lightweight and flexible library for writing command-line apps in Ruby.

The FileUtils Ruby library includes Several file utility methods for copying, moving, removing, etc.

Redcarpet is an extensible Ruby library for Markdown processing and conversion to (X)HTML.

This library contains some useful functionality to support the development of Ruby gems.

Ruby C bindings to the Yajl JSON stream-based parser library. The API is compatible with the JSON gem, so yajl-ruby can act as a drop in replacement.

A modified copy of yajl is used, and included in the package.

Amazon Web Services Signature Version 4 signing library. Generates sigv4 signature for HTTP requests.

This gem extends ruby-rdf with several common RDF vocabularies.

stackprof is a fast sampling profiler for Ruby code, with cpu, wallclock and object allocation samplers.

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

Type system for Ruby supporting coercions, constraints and complex types like structs, value objects, enums etc

A pure Ruby AsciiMath parsing and conversion library. AsciiMath is an easy-to-write markup language for mathematics.

Sass Spec is a test suite for Sass. Test cases are all in the spec directory.

This package provides methods for benchmarking Ruby code, giving detailed reports on the time taken for each task.

FastImage finds the size or type of an image given its uri by fetching as little as needed.

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

The SafeYAML gem provides an alternative implementation of YAML.load suitable for accepting user input in Ruby applications.

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

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

This package provides localhost, a Ruby library for Managing a local certificate authority for self-signed, localhost development servers.

Appraisal integrates with bundler and rake to test your library against different versions of dependencies in repeatable scenarios called "appraisals."

SimpleCov is a code coverage framework for Ruby with a powerful configuration library and automatic merging of coverage across test suites.