RGL is a framework for graph data structures and algorithms. The design of the library is much influenced by the Boost Graph Library (BGL) which is written in C++.

This RSpec plugin makes it easy to mark test cases as pending or skipped for a specific Ruby engine (e.g. MRI or JRuby) or version combinations.

CukeModeler facilitates modeling a test suite that is written in Gherkin (e.g. Cucumber, SpecFlow, Lettuce, etc.). It does this by providing an abstraction layer on top of the Abstract Syntax Tree (AST) that the cucumber-gherkin generates when parsing features, as well as providing models for feature files and directories in order to be able to have a fully traversable model tree of a test suite's structure. These models can then be analyzed or manipulated more easily than the underlying AST layer.

Ruby Rsync is a Ruby library that can synchronize files between remote hosts by wrapping the rsync binary.

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.

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

RDoc produces HTML and command-line documentation for Ruby projects. RDoc includes the +rdoc+ and +ri+ tools for generating and displaying documentation from the command-line.

Sanitize is a whitelist-based HTML and CSS sanitizer. Given a list of acceptable elements, attributes, and CSS properties, Sanitize will remove all unacceptable HTML and/or CSS from a string.

This library provides Ruby qFFI bindings to the libsass library. This enables rendering SASS from Ruby code.

Lemon is a unit testing framework that enforces highly formal case-to-class and unit-to-method test construction. This enforcement can help focus concern on individual units of behavior.

The Wapiti-Ruby gem provides a wicked fast linear-chain CRF API for sequence segmentation and labelling. It is based on the codebase of Wapiti.

This package provides methods for benchmarking Ruby code, giving detailed reports on the time taken for each task.

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.

pry-stack_explorer is a plugin for the Pry REPL that add support to navigate the call-stack.

This package provides Ruby language binding for libvirt's native C API.

This gem generates a treemap showing the complexity of Ruby code on which it is run. It uses Saikuro under the covers to analyze Ruby code complexity.

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.

This package provides an automated way to track, and then re-run failed RSpec tests.

This package allows you to test FTP implementations in ruby. It is a minimal single-client FTP server that can be bound to any arbitrary port on localhost.

Minitest-global_expectations allows continued use of expectation methods on all objects. Calling expectation methods on all objects was deprecated in minitest 5.12, and is planned to be removed from minitest 6.

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

The Listen gem listens to file modifications and notifies you about the changes.

ruby-hydra is a Ruby library for working with hyphenation patterns.

Inspired by Electric XML library for Java, REXML aims to be easy-to-use API, small and fast. It supports both tree and stream document parsing.