libffi wrapper for Ruby

https://github.com/ruby/fiddle

Flamegraph support for arbitrary ruby apps

https://github.com/SamSaffron/flamegraph

Fluentd plugin to include format values into json, tsv or csv

https://github.com/tagomoris/fluent-mixin-plaintextformatter

Fluent plugin which provides directives for loop extraction

https://github.com/tagomoris/fluent-plugin-config-expander

Gems for fluent plugin of alternative implementation of out_file

https://rubygems.org/gems/fluent-plugin-file-alternative

Gems for fluent plugin to read whole line into single key

https://github.com/yteraoka/fluent-plugin-tail-asis

Fluent event collector

http://fluentd.org/

Ruby interface to gd 2 library

http://gd2.rubyforge.org/

Ruby extension to GDBM library

https://github.com/ruby/gdbm

GDSII reader and writer

http://rubyforge.org/projects/gdsii/

Gem containing EmojiOne unicode/image assets

https://github.com/bonusly/gemojione

Gem containing EmojiOne unicode/image assets

https://github.com/jonathanwiesel/gemojione

Ruby gem for maps-based apps

https://github.com/geokit/geokit

GetoptLong for Ruby

https://github.com/ruby/getoptlong

Provides Gitlab Emoji assets

https://gitlab.com/gitlab-org/gitlab_emoji

URIs for your models makes it easy to pass references around

https://github.com/rails/globalid

Define error classes for google-cloud-ruby

https://cloud.google.com/ruby/docs/reference/google-cloud-errors/latest/ https://googleapis.github.io/google-cloud-ruby/docs/ https://github.com/googleapis/google-cloud-ruby/tree/main/google-cloud-errors https://github.com/googleapis/google-cloud-ruby

Utility classes for logging to Google Cloud Logging

https://github.com/googleapis/ruby-core-libraries/tree/main/google-logging-utils https://github.com/googleapis/ruby-core-libraries

Ruby extension to Google Protocol Buffers

https://protobuf.dev/ https://github.com/protocolbuffers/protobuf https://github.com/protocolbuffers/protobuf/tree/main/ruby

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

Fast, Enjoyable HTML Parser for Ruby

https://github.com/hpricot/hpricot

HTML entity encoding and decoding for Ruby

https://rubygems.org/gems/htmlentities

Build form data request bodies

https://github.com/httprb/form_data

Simple callback-based HTTP request/response parser

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

Yet another HTTP client implementation by NaHi

https://github.com/nahi/httpclient

New wave Internationalization support for Ruby

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

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/

Native Ruby package for reading and writing INI files

https://github.com/twp/inifile

Gems for iobuffer

https://github.com/tarcieri/iobuffer

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

JSON implementation as a Ruby extension in C

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

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

Helper class for launching cross-platform applications

https://github.com/copiousfreetime/launchy

Helper class for launching cross-platform applications

https://github.com/copiousfreetime/launchy

Mechanism to parse ruby little-plugger files

https://github.com/TwP/little-plugger

Simple logging utility for outputting messages

https://github.com/ruby/logger

Simple logging utility for outputting messages

https://github.com/ruby/logger

Logging library based on Java's log4j

https://github.com/TwP/logging

Library for manipulating HTML/XML documents and fragments

https://github.com/flavorjones/loofah

Library for manipulating HTML/XML documents and fragments

https://github.com/flavorjones/loofah

Parser / Dumper for LTSV

https://github.com/condor/ltsv

Ruby email handler

https://github.com/mikel/mail

Provides 'mail' gem with iso-2022-jp conversion capability

https://github.com/kuroda/mail-iso-2022-jp

Implementation of Matrix and Vector classes

https://github.com/ruby/matrix