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.

This RSpec plugin allows you to use block_is_expected similarly to how you would use is_expected if a block was wrapping the subject.

This package provides a tool for writing manuals for Prawn and Prawn accessories

Multicodecs is the ruby implementation of multiformats/multicodec, a canonical table of of codecs used by various multiformats.

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

Tilt is a thin interface over a number of different Ruby template engines in an attempt to make their usage as generic as possible.

This package provides a MiniTest plugin for displaying the slowest tests in a minitest suite.

bake-test automatically discovers how to run local test suites for Ruby projects. It supports rspec, sus, as well as rake.

Rack provides a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses, it unifies the API for web servers, web frameworks, and software in between into a single method call.

ruby_engine provides an RubyEngine class that can be used to check which implementation of Ruby is in use. It can provide the interpreter name and provides query methods such as RubyEngine.mri?.

Fuubar is an RSpec formatter that uses a progress bar instead of a string of letters and dots as feedback. It also stops on the first test failure.

IRB is an interactive Ruby command-line tool for REPL (Read Eval Print Loop).

This library makes it easier to discover the truth values of various Ruby objects.

Base32 is a library which provides base32 decoding and encoding.

This package provides a WebSocket base for a Ruby client and server.

The gem public_suffix is a domain name parser, written in Ruby, and based on the Public Suffix List. A public suffix is one under which Internet users can (or historically could) directly register names. Some examples of public suffixes are .com, .co.uk and pvt.k12.ma.us. The Public Suffix List is a list of all known public suffixes.

This module allows Ruby programs to interface with the SQLite3 database engine.

Kramdown is a library for parsing and converting a superset of Markdown. It is completely written in Ruby, supports standard Markdown (with some minor modifications) and various extensions that have been made popular by the PHP Markdown Extra package and Maruku.

Module Stream defines an interface for external iterators.

TaskJuggler (tj3) is a project management tool for project planning and tracking using a domain specific language; projects are plain text files written using your favourite text editor. It includes reporting in HTML, CSV or iCalendar format and an email based status tracking system to send and receive time sheets from collaborators.

It covers the complete spectrum of project management tasks from the first idea to the completion of the project. It assists you during project scoping, resource assignment, cost and revenue planning, risk and communication management, status tracking and reporting.

RR is a test double framework that features a rich selection of double techniques and a terse syntax.

PandocRuby is a wrapper for Pandoc, a Haskell library with command line tools for converting one markup format to another. Pandoc can convert documents from a variety of formats including markdown, reStructuredText, textile, HTML, DocBook, LaTeX, and MediaWiki markup to a variety of other formats, including markdown, reStructuredText, HTML, LaTeX, ConTeXt, PDF, RTF, DocBook XML, OpenDocument XML, ODT, GNU Texinfo, MediaWiki markup, groff man pages, HTML slide shows, EPUB, Microsoft Word docx, and more.

Gherkin-ruby is a Gherkin parser written in pure Ruby and less than 200 lines of code.

MSpec is a specialized framework that is syntax-compatible with RSpec 2 for basic features. MSpec contains additional features that assist in writing specs for Ruby implementations in ruby/spec.