TTFunk is a TrueType font parser written in pure Ruby. It is used as part of the Prawn PDF generator.

multipart-parser is a simple parser for multipart MIME messages, written in Ruby, based on felixge/node-formidable's parser. It has the following characteristics:

• Pure Ruby

• Event-driven API

• Only supports one level of multipart parsing

• Does not perform I/O

• Does not depend on any other library.

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.

This gem is a library that provides trigonometric and transcendental functions for complex numbers. The functions in this module accept integers, floating-point numbers or complex numbers as arguments.

BlankSlate provides an abstract base class with no predefined methods (except for __send__ and __id__). BlankSlate is useful as a base class when writing classes that depend upon method_missing (e.g. dynamic proxies).

Rouge is a code highlighter written in Ruby. It supports more than 100 languages and outputs HTML or ANSI 256-color text. Its HTML output is compatible with stylesheets designed for pygments.

CountDownLatch is a synchronization aid that allows one or more threads to wait until a set of operations being performed in other threads completes.

RubyPants is a Ruby port of the smart-quotes library SmartyPants. The original SmartyPants is a web publishing plug-in for Movable Type, Blosxom, and BBEdit that easily translates plain ASCII punctuation characters into smart typographic punctuation HTML entities.

RSpec::Its provides the its method as a short-hand to specify the expected value of an attribute. For example, one can use its(:size)\should eq(1)\.

This library provides methods to encode and decode Ascii85 binary-to-text encoding. The main modern use of Ascii85 is in PostScript and Portable Document Format (PDF) file formats.

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

A Ruby gem for tokenizing, parsing, and transforming regular expressions. It comprises the following components:

• A scanner/tokenizer based on Ragel,

• A lexer that produces a stream of token objects,

• A parser that produces a tree of Expression objects.

Skinny is a simple, upgradable WebSockets for Ruby, using the Thin library.

minitest-rg changes the colour of the output from Minitest.

Open4 is a Ruby library to run child processes and manage their input and output.

The cane gem provides a great framework for running quality checks over your ruby project as part of continuous integration build. It comes with a few checks out of the box, but also provides an API for loading custom checks. This gem provides a set of additional checks.

This package provides telnet client functionality.

When mutex_m is required, any object that extends or includes Mutex_m will be treated like a Mutex.

Launchy is helper class for launching applications in a fire and forget manner. The aim of Launchy is to provide a common approach to launching external applications from within Ruby programs.

Given a string pattern, Mustermann will turn it into an object that behaves like a regular expression and has comparable performance characteristics.

websocket-extensions provides a container for registering extension plugins.

The SnakyHash Ruby library provides classes for normalizing hash keys and look-ups, and a pseudo-object interface.

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

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.