Powerful tool to avoid N+1 DB or HTTP queries

https://github.com/exAspArk/batch-loader

OpenBSD bcrypt password hashing algorithm

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

Protocol Buffers library in pure Ruby

https://github.com/protobuf-ruby/beefcake

Intended to work as a drop-in for Rails applications

http://www.bigrecord.org

Binary dissector and generator

https://codeberg.org/lemontree55/bin_struct

Extracting binary integers from binary string and packing back

https://github.com/funny-falcon/bin_utils

Retrieve the binding of a methods caller

https://github.com/banister/binding_of_caller

Emulate Bio::Fetch object

https://github.com/ngoto/bioruby-old-biofetch-emulator

Ruby bindings for Blurhash library

https://github.com/Gargron/blurhash

Boot large ruby/rails apps faster

https://github.com/rails/bootsnap

Web browser detection for Ruby

https://github.com/fnando/browser

Bring your own LUA scripts into redis

https://github.com/brpoplpush/brpoplpush-redis_script

Extracts token delimited entities from arbitrary inputs

https://github.com/sferik/buftok

Extracts token delimited entities from arbitrary inputs

https://github.com/sferik/buftok

Facilitate programmatic generation of XML markup

https://github.com/tenderlove/builder

Tool that manages gem dependencies for Ruby applications

https://bundler.io/

Another synchronous Ruby AMQP client

https://github.com/ruby-amqp/bunny

Rapid DSL prototyping in Ruby

https://github.com/delano/caesars

Simple CAPTCHA written in Ruby

https://github.com/winton/captcha

Extraction of the key_transform abilities of ActiveModelSerializers

https://github.com/NullVoxPopuli/case_transform

Build, read, write and compare sets of Unicode codepoints

https://github.com/jaynetics/character_set

Provide binary and text detection as well as text transcoding using libicu

https://github.com/brianmario/charlock_holmes

Gyoku translates Ruby Hashes to XML

https://github.com/chef/chef-gyoku

External background process controller

https://github.com/enkessler/childprocess

Ruby library to read and write PNG images

https://github.com/wvanbergen/chunky_png/wiki

Command-line interface framework

https://about.gitlab.com/

Ruby interface to ClickHouse databases

https://gitlab.com/gitlab-org/ruby/gems/clickhouse-client

Fast and easy syntax highlighting for selected languages

http://coderay.rubychan.de/

Coffee Script adapter for the Rails asset pipeline

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

Ruby CoffeeScript is a bridge to the JS CoffeeScript compiler

https://github.com/rails/ruby-coffee-script

Little language that compiles into JavaScript

https://github.com/jashkenas/coffeescript

Colorize your text in the terminal

https://github.com/octopress/colorator

Colors in your terminal, simple as it can be

https://rubygems.org/gems/colored2

Ruby wrapper for libcmark (CommonMark parser)

https://github.com/gjtorikian/commonmarker

Modern concurrency tools for Ruby

https://github.com/ruby-concurrency/concurrent-ruby

Generic connection pool for Ruby

https://github.com/mperham/connection_pool

Beautiful logging for Ruby

https://socketry.github.io/console/ https://github.com/socketry/console

Library for parsing and returning cookies in Ruby HTTP clients

https://github.com/dwaite/cookiejar

Gems for cool.io

https://github.com/tarcieri/cool.io

Delightful CLI UI module

https://github.com/CocoaPods/Cork

Ruby implementation of RFC 8152 CBOR Object Signing and Encryption

https://github.com/cedarcode/cose-ruby

CSS parser based on the CSS Syntax Level 3 draft

https://github.com/rgrove/crass

Allow building easy-to-use command-line interfaces

https://github.com/denisdefreyne/cri

Set of classes for parsing CSS in Ruby

https://github.com/premailer/css_parser

Ruby binding to process CVSS entries

https://github.com/0llirocks/cvss-suite

Toolkit to convert your script to a controllable daemon

https://github.com/thuehlinger/daemons

High performance memcached client for Ruby

https://github.com/petergoldstein/dalli

Unified Ruby API for popular databases

https://github.com/datamapper/do

Library for reading dBase, xBase, Clipper and FoxPro database files

https://github.com/infused/dbf

Library for reading dBase, xBase, Clipper and FoxPro database files

https://github.com/infused/dbf