HTTP::Cookie is a Ruby library to handle HTTP Cookies based on RFC 6265. It has been designed with security, standards compliance and compatibility in mind, to behave just the same as today's major web browsers. It has built-in support for the legacy cookies.txt and cookies.sqlite formats of Mozilla Firefox.

Blather is a XMPP DSL for Ruby written on top of EventMachine and Nokogiri.

Thin is a Ruby web server that glues together 3 Ruby libraries:

• the Mongrel parser,

• Event Machine, a network I/O library with high scalability, performance and stability,

• Rack, a minimal interface between webservers and Ruby frameworks.

Prawn::Icon provides various icon fonts including FontAwesome, PaymentFont and Foundation Icons for use with the Prawn PDF toolkit.

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

The Polyglot library allows a Ruby module to register a loader for the file type associated with a filename extension, and it augments require to find and load matching files.

This package provides a small C extension to speed up variable length integers (varint) in Ruby Protocol Buffers.

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

This package provides a library to help create value objects without the pain of Ruby's Struct (or its setters).

Forwardable Extended provides more Forwardable methods for your source as Forwardable::Extended.

This library uses the output of the ps command to create a process tree data structure for the current host.

This package provides an alternative implementation of the Ruby GetText library that is approximately 12x faster yet thread safe.

Ruby/ProgressBar is an flexible text progress bar library for Ruby. The output can be customized with a formatting system.

Common protocol buffer types used by Google APIs

Concurrent Ruby includes concurrency tools such as agents, futures, promises, thread pools, actors, supervisors, and more. It is inspired by Erlang, Clojure, Go, JavaScript, actors, and classic concurrency patterns.

Ruby/Git is a Ruby library that can be used to create, read and manipulate Git repositories by wrapping system calls to the git binary.

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments. It's built on top of Nokogiri and libxml2.

Archive::Tar::Minitar is a pure-Ruby library and command-line utility that provides the ability to deal with POSIX tar archive files.

The Pagination Generator forms the core of the pagination logic in Jekyll. It calculates and generates the pagination pages.

This package provides a gem to convert LaTeX input to Unicode. Its original use was as an input filter for BibTeX-Ruby, but it can be used independently to decode LaTeX. Many of the patterns used by this Ruby gem are based on François Charette's equivalent Perl module LaTeX::Decode.

Erubis is a fast implementation of embedded Ruby (eRuby) with several features such as multi-language support, auto escaping, auto trimming spaces around <% %>, a changeable embedded pattern, and Ruby on Rails support.

Addressable is a replacement for the URI implementation that is part of Ruby's standard library. It more closely conforms to RFC 3986, RFC 3987, and RFC 6570 (level 4), providing support for IRIs and URI templates.

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.

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.