Map simple html back into markdown, e.g. if you want to import existing html data in your application.

Game written in Ruby for learning Ruby and artificial intelligence.

A simple universally unique ID generation library.

A scripting framework that replaces rake, sake and rubigen

A scripting framework that replaces rake, sake and rubigen

RubyRC4 is a pure Ruby implementation of the RC4 algorithm.

This gem simplifies generating the claims needed to authenticate with the Atlassian Connect REST APIs.

DSL for declaring params and options of the initializer

Draper adds an object-oriented layer of presentation logic to your Rails apps.

LittlePlugger is a module that provides Gem based plugin management. By extending your own class or module with LittlePlugger you can easily manage the loading and initializing of plugins provided by other gems.

Implements the iCalendar specification (RFC-5545) in Ruby. This allows for the generation and parsing of .ics files, which are used by a variety of calendaring applications.

ruby-vips is a binding for the libvips image processing library. It is fast and it can process large images without loading the whole image in memory.

A Parsing Expression Grammar (PEG) Parser generator DSL for Ruby

LicenseFinder works with your package managers to find dependencies, detect the licenses of the packages in them, compare those licenses against a user-defined list of permitted licenses, and give you an actionable exception report.

Generate equivalent source for parser gem AST nodes

Terminal strings styling with intuitive and clean API.

A plugin for RuboCop code style enforcing & linting tool. It includes Rubocop configuration used at Airbnb and a few custom rules that have cause internal issues at Airbnb but are not supported by core Rubocop.

Sunspot is a library providing a powerful, all-ruby API for the Solr search engine. Sunspot manages the configuration of persistent Ruby classes for search and indexing and exposes Solr's most powerful features through a collection of DSLs. Complex search operations can be performed without hand-writing any boolean queries or building Solr parameters by hand.

Unobtrusive nested forms handling, using jQuery. Use this and discover cocoon-heaven.

Poltergeist is a driver for Capybara that allows you to run your tests on a headless WebKit browser, provided by PhantomJS.