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

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

This package provides a lightweight mime type lookup toy.

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

This package provides telnet client functionality.

Ethon is a very basic libcurl wrapper using ffi.

Zeitwerk implements constant autoloading with Ruby semantics. Each gem and application may have their own independent autoloader, with its own configuration, inflector, and logger. Supports autoloading, reloading, and eager loading.

MultiXml provides swappable XML backends utilizing either LibXML, Nokogiri, Ox, or REXML.

Deep Merge is a set of utility functions for Hash. It permits you to merge elements inside a hash together recursively.

Nokogiri (鋸) parses and searches XML/HTML, and features both CSS3 selector and XPath 1.0 support.

m stands for metal, a better test/unit and minitest test runner that can run tests by line number.

This library only provides the FFI wrapper for the ZeroMQ networking library. It can be used to implement a Ruby API for the ZeroMQ library.

Rack::Mount supports Rack's X-Cascade convention to continue trying routes if the response returns pass. This allows multiple routes to be nested or stacked on top of each other.

This package provides a command line interface for running for Rack applications.

CI::Reporter is an add-on to Ruby testing frameworks that allows you to generate XML reports of your test runs. The resulting files can be read by a continuous integration system that understands Ant's JUnit report format.

The Hashery is a tight collection of Hash-like classes. Included are the auto-sorting Dictionary class, the efficient LRUHash, the flexible OpenHash and the convenient KeyHash. Nearly every class is a subclass of the CRUDHash which defines a CRUD (Create, Read, Update and Delete) model on top of Ruby's standard Hash making it possible to subclass and augment to fit any specific use case.

Dotenv is a Ruby library for setting environment variables defined in a .env file. This is the Rails variant, adapted for use with Ruby on Rails projects.

Middleware is a generalized implementation of a middleware abstraction for Ruby.

KPeg is a simple PEG library for Ruby. It provides an API as well as native grammar to build the grammar. KPeg supports direct left recursion of rules via the OMeta memoization technique.

This package provides a WebSocket server for Ruby.

rest-client provides a simple HTTP and REST client for Ruby, inspired by the Sinatra microframework style of specifying actions: get, put, post, delete.

Asciidoctor generates single-page documents. This extension splits documents up into multiple HTML pages according to their headings, with configurable levels.

Systemu can be used on any platform to return status, stdout, and stderr of any command. Unlike other methods like open3 and popen4 there is no danger of full pipes or threading issues hanging your process or subprocess.

This package provides unicode normalization form support for Ruby.