FFI wrapper around the system GSSAPI library

https://github.com/zenchild/gssapi

Library for translating Ruby hashes to XML

https://github.com/savonrb/gyoku

Module 'hangouts-chat' gem to talk to G Suite Hangouts Chat rooms

https://github.com/enzinia/hangouts-chat

Tight collection of Hash-like classes

https://rubyworks.github.io/hashery/

Simple collection of useful Hash extensions

https://github.com/hashie/hashie

Simple collection of useful Hash extensions

https://github.com/hashie/hashie

ORM that maps REST resources to Ruby objects

https://github.com/remi/her

Removes common margin from indented strings

https://github.com/adrianomitre/heredoc_unindent

High-level IO library for command-line interfaces

https://github.com/JEG2/highline

Text-to-HTML conversion tool for web writers

https://github.com/hiki/hikidoc

Ruby wrapper for hiredis

https://github.com/redis/hiredis-rb

Give objects the ability to 'histogram' in several useful ways

https://github.com/jtprince/histogram

Simple rake/rubygems helper for project Rakefiles

https://docs.seattlerb.org/hoe/ https://github.com/seattlerb/hoe

Fast, Enjoyable HTML Parser for Ruby

https://github.com/hpricot/hpricot

HTML entity encoding and decoding for Ruby

https://rubygems.org/gems/htmlentities

Simple Ruby DSL for making HTTP requests

https://github.com/httprb/http

Parse Accept and Accept-Language HTTP headers

https://github.com/socketry/http-accept

Ruby library to handle HTTP Cookies

https://github.com/sparklemotion/http-cookie

Build form data request bodies

https://github.com/httprb/form_data

Super fast http parser for Ruby

https://github.com/cotag/http-parser

Simple callback-based HTTP request/response parser

https://github.com/tmm1/http_parser.rb

HTTP router for use in Rack

https://github.com/joshbuddy/http_router

Ruby Library that Makes HTTP Fun Again

https://www.johnnunemaker.com/httparty/ https://github.com/jnunemaker/httparty

Library for HTTP authentication protocol in RFC 2617

https://github.com/Manfred/HTTPauth

Yet another HTTP client implementation by NaHi

https://github.com/nahi/httpclient

New wave Internationalization support for Ruby

https://github.com/ruby-i18n/i18n

Deep freeze Ruby objects

https://github.com/dkubb/ice_nine

iconv wrapper library

https://github.com/ruby/iconv

High-level wrapper for processing images for the web with ImageMagick or libvips

https://github.com/janko/image_processing

Ruby library that generates thumbnails

https://github.com/seattlerb/image_science

RubyGem for finding the size of an image

http://imagesize.rubyforge.org/

Ruby library for InfluxDB

http://influxdb.org/

Native Ruby package for reading and writing INI files

https://github.com/twp/inifile

Simplified network interface API

https://github.com/picatz/interfacez

Provide a separation of concerns interface for IO endpoints

https://socketry.github.io/io-endpoint/ https://github.com/socketry/io-endpoint

Provide a generic stream wrapper for IO instances

https://socketry.github.io/io-stream/ https://github.com/socketry/io-stream

Gems for iobuffer

https://github.com/tarcieri/iobuffer

Set of methods to manipulate an IP address

https://github.com/ruby/ipaddr

IP address manipulation library for rubygems

https://github.com/bluemonk/ipaddress

Ruby implementation of Mail.Ru iproto protocol

https://github.com/mailru/iproto-ruby

Create JSON structures via a Builder-style DSL

https://github.com/rails/jbuilder

MySQL JDBC driver for JRuby

https://github.com/jruby/activerecord-jdbc-adapter/tree/master/jdbc-mysql

Implement JMESPath for Ruby

https://github.com/jmespath/jmespath.rb

Provides a Rails generator for jQuery

https://github.com/rails/jquery-rails

JSON implementation as a Ruby extension in C

https://ruby.github.io/json/ https://github.com/ruby/json/releases

JSON Web Token implementation in Ruby

https://github.com/nov/json-jwt

JSON Web Token implementation in Ruby

https://github.com/nov/json-jwt

JSON implementation in pure Ruby

https://ruby.github.io/json/ https://github.com/ruby/json/releases

Render JSONAPI documents

https://github.com/jsonapi-rb/jsonapi-renderer

JSON Web Token implementation in Ruby

https://github.com/jwt/ruby-jwt