Do some browser detection with Ruby.

This CLAide plugin shows information about all available CLAide plugins (yes, this is very meta!). This plugin adds the "plugins" subcommand to a binary so that you can list all plugins (registered in the reference JSON hosted at CocoaPods/cocoapods-plugins)

A fast, open source text processor and publishing toolchain for converting AsciiDoc content to HTML 5, DocBook 5, and other formats.

A Rails form builder plugin/gem with semantically rich and accessible markup

Parse CSS and add vendor prefixes to CSS rules using values from the Can I Use website.

An interactive way to learn git.

A Ruby library for carefully refactoring critical paths

Xcodebuild formatter designed to be piped with `xcodebuild`, and thus keeping 100% compatibility. It has modes for CI, running tests (RSpec dot-style), and it can also mine Bitcoins.

OAuth Core Ruby implementation

ActiveModel/Record integrations for Elasticsearch.

Changelog generation has never been so easy. Fully automate changelog generation - this gem generate changelog file based on tags, issues and merged pull requests from GitHub.

Sorbet's runtime type checking component

Namespaced Rack::Session, Rack::Cache, I18n and cache Redis stores for Ruby web frameworks.

Unaccent replaces a string's accented characters with unaccented characters

Type system for Ruby supporting coercions, constraints and complex types like structs, value objects, enums etc

Extraction of the JSON parsing tools shared between a number of providers in the 'fog' gem.

A toolset of small support modules used throughout the dry-rb ecosystem

Wicked PDF uses the shell utility wkhtmltopdf to serve a PDF file to a user from HTML. In other words, rather than dealing with a PDF generation DSL of some sort, you simply write an HTML view as you would normally, and let Wicked take care of the hard stuff.

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

Roo can access the contents of various spreadsheet files. It can handle * OpenOffice * Excelx * LibreOffice * CSV