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.

Syntax Tree is a suite of tools built on top of the internal CRuby parser. It provides the ability to generate a syntax tree from source, as well as the tools necessary to inspect and manipulate that syntax tree. It can be used to build formatters, linters, language servers, and more.

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

This package provides a implementations of custom cops that are bundled as defaults in Standard Ruby.

fog is a Ruby cloud services library. This package provides shared classes and tests for fog providers and services.

EmailReplyTrimmer is a Ruby small library to trim replies from plain text email.

This gem provides tables support for Prawn.

This package provides Ruby support for the HOCON configuration file format. It supports parsing and modifying HOCON and JSON files, and rendering parsed objects back to a String.

This gem contains the core algorithms and classes used for doing basic programming with RDF data, implemented in pure Ruby.

This package provides a Ruby module that provides a two-phase lock with a counter.

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.

Pg is the Ruby interface to the PostgreSQL RDBMS. It works with PostgreSQL 9.3 and later.

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 class implements the File Transfer Protocol. If you have used a command-line FTP program, and are familiar with the commands, you will be able to use this class easily. Some extra features are included to take advantage of Ruby's style and strengths.

This small library lets you see which property values are supported by the regular expression engine of the Ruby version you are running and can directly read out their code point ranges. In other words, it determines all supported values for \pvalue expressions and what they match.

This package provides a RubyVersion class which offers a convenient Domain Specific Language (DSL) for checking for the right Ruby version.

This module adds support for the TomDoc documentation format to YARD, a documentation generation tool for Ruby.

CZMQ Ruby bindings, based on the generated low-level FFI bindings of CZMQ. The focus of of CZTop is on being easy to use and providing first class support for security mechanisms.

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

This package provides additional test assertions for Ruby standard libraries.

The ruby_memcheck gem provides a sane way to use Valgrind's memcheck on your native extension gem, that filters out all the false positives caused by Ruby not freeing all of the memory it allocates during shutdown.

Solargraph provides a comprehensive suite of tools for Ruby programming: intellisense, diagnostics, inline documentation, and type checking.

This package provides a Jekyll plugin to silently generate a sitemaps.org compliant sitemap for your Jekyll site.

This library allows reading and writing RPM packages. It is used by the fpm tool. It is written in pure Ruby because librpm is not available on all systems and requires many dependencies.