The sys-uname library provides an interface for gathering information about your current platform. It allows retrieving information such as the OS name, OS version, system name, etc.

Assertive Expressive (AE) is an assertions library specifically designed for reuse by other test frameworks.

This pure ruby library provides spawn() which is almost perfectly compatible with ruby 1.9's.

ValueSemantics generates modules that provide conventional value semantics for a given set of attributes. The behaviour is similar to an immutable Struct class, plus extensible, lightweight validation and coercion.

This package provides a Ruby library to handle the WebSocket protocol.

Clap provides command line argument parsing features. It covers the simple case of executing code based on the flags or parameters passed.

This package provides a Jekyll plugin to add metadata tags for search engines and social networks to better index and display your site's content.

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

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

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

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

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

Bump provides commands to manage Rubygem versioning, updating to the next patch version for example.

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 Language Server Protocol (LSP) development kit for Ruby.

Namae (名前) is a parser for human names. It recognizes personal names of various cultural backgrounds and tries to split them into their component parts (e.g., given and family names, honorifics etc.).

WWTD is a Travis Simulator that lets you run test matrices defined in .travis.yml on your local machine, using rvm, rbenv, or chruby to test different versions of Ruby.

This library provides Ruby with an interface for validating JSON objects against a JSON schema conforming to JSON Schema Draft 4. Legacy support for JSON Schema Draft 3, JSON Schema Draft 2, and JSON Schema Draft 1 is also included.

jaro_winkler is an implementation of Jaro-Winkler distance algorithm. It is written as a C extension and will fallback to a pure Ruby implementation on platforms where this is unsupported.

This library implements HTTP's digest authentication scheme based on RFC 2617. This enables the use of the digest authentication scheme instead of the more insecure basic authentication scheme.

The test-queue module is a parallel test runner, built using a centralized queue to ensure optimal distribution of tests between workers. It is specifically optimized for Continuous Integration (CI) environments: build statistics from each run are stored locally and used to sort the queue at the beginning of the next run.

Gettext is a GNU gettext-like program for Ruby. The catalog file (po-file) used is the same as that used by GNU gettext, allowing you to use GNU gettext tools for maintenance.

Bacon is a small RSpec clone providing all essential features.

Cutest runs tests in separate processes to avoid shared state.