Ruby extension for base32 encoding and decoding

https://github.com/stesla/base32

Encode and decode binary data using a Base64 representation

https://github.com/ruby/base64

Performance benchmarking library

https://github.com/ruby/benchmark

Arbitrary-precision decimal floating-point number class

https://github.com/ruby/bigdecimal

Arbitrary-precision decimal floating-point number class

https://github.com/ruby/bigdecimal

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

Integrated environment for Bioinformatics written in Ruby

http://bioruby.org/

Collection of miscellaneous utilities for bioinformatics

https://github.com/bioruby/bioruby-executables

Emulate Bio::Fetch object

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

Command-line interface on BioRuby

https://github.com/bioruby/bioruby-shell

Ruby bindings for Blurhash library

https://github.com/Gargron/blurhash

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/ https://github.com/rubygems/rubygems/tree/master/bundler

Ruby 2 debugger

https://github.com/deivid-rodriguez/byebug

Support for the Common Gateway Interface protocol

https://github.com/ruby/cgi

External background process controller

https://github.com/enkessler/childprocess

Ruby library to read and write PNG images

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

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

Modern concurrency tools for Ruby

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

Generic connection pool for Ruby

https://github.com/mperham/connection_pool

Gems for cool.io

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

Provides a simple interface on top of CouchDBs RESTful HTTP API

https://github.com/couchrest/couchrest

CSS parser based on the CSS Syntax Level 3 draft

https://github.com/rgrove/crass

Interface to CSV files and data

https://github.com/ruby/csv

Subclass of Object includes Comparable module for handling dates

https://github.com/ruby/date

Ruby wrapper for the MRI 2.0 debug_inspector API

https://github.com/banister/debug_inspector

LCS-based diff library for ruby

https://halostatue.github.io/diff-lcs/ https://github.com/halostatue/diff-lcs

On-the-fly Rack-based image handling framework

https://markevans.github.io/dragonfly/ https://github.com/markevans/dragonfly

Distributed object system for Ruby

https://github.com/ruby/drb

Ruby gem for emoji

https://github.com/wpeterson/emoji

Yet another emoji handler

https://github.com/melborne/emot

Ruby library to define equality methods

https://github.com/dkubb/equalizer

ERB template engine for Ruby

https://github.com/jeremyevans/erubi

Fast, secure, and extensible implementation of eRuby

http://www.kuwata-lab.com/erubis/

Very lightweight libcurl wrapper

https://github.com/typhoeus/ethon

Fast, simple event-processing library for Ruby programs

https://rubyeventmachine.com

ExecJS lets you run JavaScript code from Ruby

https://github.com/rails/execjs

Pure-ruby EXIF reader

https://github.com/remvee/exifr

Faraday adapter for Em::Http

https://github.com/lostisland/faraday-em_http

Faraday adapter for Em::Synchrony

https://github.com/lostisland/faraday-em_synchrony

Faraday adapter for Excon

https://github.com/lostisland/faraday-excon

Faraday adapter for HTTPClient

https://github.com/lostisland/faraday-httpclient

Faraday adapter for HTTPClient

https://github.com/lostisland/faraday-httpclient

Perform multipart-post requests using Faraday

https://github.com/lostisland/faraday-multipart

Faraday adapter for Net::HTTP

https://github.com/lostisland/faraday-net_http

Faraday adapter for NetHttpPersistent

https://github.com/lostisland/faraday-net_http_persistent

Faraday adapter for Patron

https://github.com/lostisland/faraday-patron