100% pure-Java implementation of Ruby

Ruby bindings for graphviz

threaded HTTP 1.1 server for Ruby/Rack applications

MVC ruby based framework geared for web application development (metapackage)

Lexical scanner generator for Ruby

Interpreter of object-oriented scripting language Ruby

Header files for compiling extension modules for the Ruby 2.5

WebSocket framework for Rails (part of Rails)

email composition, delivery, and receiving framework (part of Rails)

web-flow and rendering framework putting the VC in MVC (part of Rails)

framework for handling view template lookup and rendering (part of Rails)

job framework with pluggable queues

toolkit for building modeling frameworks (part of Rails)

object-relational mapper framework (part of Rails)

Local and cloud file storage framework (part of Rails)

Support and utility classes used by the Rails 4.1 framework

Ruby interface to the Git revision control system

Protocol Buffers

Ruby bindings for hivex

pagination engine plugin for Rails 3+ and other modern frameworks

Kaminari Action View adapter

Kaminari Active Record adapter

Kaminari's core pagination library

Fast, pure-Ruby Markdown-superset converter

manipulation and transformation of HTML/XML documents and fragments

wrapper for ImageMagick with a small memory footprint

HTML, XML, SAX, and Reader parser for Ruby

modular Ruby webserver interface

enable Cross-Origin Resource Sharing in Rack apps

Protects against typical web attacks for Rack apps

MVC ruby based framework geared for web application development

HTML sanitization for Rails applications

tools for creating, working with, and running Rails applications

Fast, safe and extensible Markdown to (X)HTML parser for Ruby

whitelist-based HTML sanitizer

Simple, efficient background processing for Ruby

Ruby web-development dressed in a DSL

collection of useful extensions to the Sinatra web framework

Ruby bindings for Apache Subversion

Daylight-savings aware timezone library