Pry Doc is a Pry REPL plugin. It provides extended documentation support for the REPL by means of improving the show-doc and show-source commands. With help of the plugin the commands are be able to display the source code and the docs of Ruby methods and classes implemented in C.

minitest/reporters provides a custom Minitest runner to improve how the test state is reported. A number of different reporters are available, including a spec reporter, progress bar reporter, a HTML reporter.

Bio-logger is a wrapper around Log4r adding extra logging features such as filtering and fine grained logging.

This package provides unicode normalization form support for Ruby.

Liquid is a template language written in Ruby. It is used to load dynamic content on storefronts.

rainbow provides a string presenter object to colorize strings by wrapping them in ANSI escape codes.

This package provides a Ruby implementation of the Coveralls API.

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

When this gem is required, it extends the Time class with with additional methods for parsing and converting Times.

Rack::Mount supports Rack's X-Cascade convention to continue trying routes if the response returns pass. This allows multiple routes to be nested or stacked on top of each other.

Bake is a task execution tool, inspired by Rake, but codifying many of the use cases which are typically implemented in an ad-hoc manner.

shoulda is a meta-package combining shoulda-context and shoulda-matchers providing tools for writing tests.

This package is a Standard Ruby Plugin providing configuration for rubocop-performance.

Spectroscope is a Behavior-Driven Development (BDD) framework built on RubyTest, designed to emulate RSpec in most respects. It is assertion framework independent so any number of assertion systems can be used, such as Assay or AE.

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

This package provides a RuboCop plugin that can be used for code style checking of Capybara test files (RSpec, Cucumber, Minitest).

This package provides telnet client functionality.

m stands for metal, a better test/unit and minitest test runner that can run tests by line number.

EventMachine implements a single-threaded engine for arbitrary network communications. EventMachine wraps all interactions with sockets, allowing programs to concentrate on the implementation of network protocols. It can be used to create both network servers and clients.

This package provides a MiniTest extension to stub constants for the duration of a block in MiniTest.

This package provides a fake file system for use in test suites. It avoids the need for manually creating temporary directories, or dealing with platform intricacies in File and FileUtils.

TZInfo is a Ruby library that provides daylight savings aware transformations between times in different time zones.

SDoc is an RDoc documentation generator to build searchable HTML documentation for Ruby code.

Pry is an IRB alternative and runtime developer console for Ruby. It features syntax highlighting, a plugin architecture, runtime invocation, and source and documentation browsing.