Discover Japan's Leading Open Source Projects: Explore top-notch open source initiatives hailing from the vibrant tech community of Japan.
ruby/ruby
The Ruby Programming Languagemame/quine-relay
An uroboros program with 100+ programming languagesdtan4/terraforming
Export existing AWS resources to Terraform style (tf, tfstate) / No longer actively maintainediberianpig/fusuma
Multitouch gestures with libinput driver on Linuxrandym/axlsx
xlsx generation with charts, images, automated column width, customizable styles and full schema validation. Axlsx excels at helping you generate beautiful Office Open XML Spreadsheet documents without having to understand the entire ECMA specification. Check out the README for some examples of how easy it is. Best of all, you can validate your xlsx file before serialization so you know for sure that anything generated is going to load on your client's machine.mizzy/serverspec
RSpec tests for your servers configured by CFEngine, Puppet, Chef, Ansible, Itamae or anything else even by handjmettraux/rufus-scheduler
scheduler for Ruby (at, in, cron and every jobs)ruby/rake
A make-like build utility for Ruby.ruby/rbs
Type Signature for Rubyruby/did_you_mean
The gem that has been saving people from typos since 2014gimite/google-drive-ruby
A Ruby library to read/write files/spreadsheets in Google Drive/Docs.remote-jp/remote-in-japan
Tech companies in Japan that hire remote workers.kmuto/review
Re:VIEW is flexible document format/conversion systemamatsuda/jb
A simple and fast JSON API template engine for Ruby on Railsinket/update_xcode_plugins
No more messing with plugin UUIDs; Plugins on Xcode 8+!soutaro/steep
Static type checker for Rubyk1LoW/awspec
RSpec tests for your AWS resources.ruby/debug
Debugging functionality for Rubyamatsuda/active_decorator
ORM agnostic truly Object-Oriented view helper for Rails 4, 5, 6, and 7nov/fb_graph
This gem doesn't support FB Graph API v2.0+. Please use fb_graph2 gem instead.yujinakayama/transpec
The RSpec syntax convertershioyama/mobility
Pluggable Ruby translation frameworkamatsuda/traceroute
A Rake task gem that helps you find the unused routes and controller actions for your Rails 3+ appruby/www.ruby-lang.org
Source of the https://www.ruby-lang.org website.mame/optcarrot
A NES emulator written in Rubyruby/rdoc
RDoc produces HTML and online documentation for Ruby projects.okuramasafumi/alba
Alba is a JSON serializer for Ruby.amatsuda/database_rewinder
minimalist's tiny and ultra-fast database cleanermatschaffer/knife-solo
DEPRECATED: Please consider using https://knife-zero.github.io/, ansible, or visit https://www.chef.io/ for other ideasruby/typeprof
An experimental type-level Ruby interpreter for testing and understanding Ruby codeyoshoku/rumale
Rumale is a machine learning library in Rubykumar91gopi/Algorithms-and-Data-Structures-in-Ruby
Ruby implementation of Algorithms,Data-structures and programming challengestricknotes/ember-cli-rails
Unify your EmberCLI and Rails Workflowsannict/annict
A platform for anime addicts built with Rails and Hotwire.Envek/after_commit_everywhere
Use ActiveRecord transactional callbacks outside of models, literally everywhere in your application.nov/rack-oauth2
OAuth 2.0 Server & Client Library. Both Bearer and MAC token type are supported.recurser/exif-orientation-examples
Example images for the various EXIF orientation flags, in both landscape and portrait orientation.ruby/ruby.wasm
ruby.wasm is a collection of WebAssembly ports of the CRuby.dennybritz/rails_startup_template
A startup template for Ruby on Rails 4 applicationsmame/radiation-hardened-quine
A robust quine program that works even after any one character is deleted.ko1/pretty_backtrace
Pretty your exception backtrace.masuidrive/open-wripe
https://wri.pe source codeamatsuda/stateful_enum
A very simple state machine plugin built on top of ActiveRecord::Enumeagletmt/switch_point
Switching database connection between readonly one and writable oneremore/burn
A Toolkit To Create 8-bit Flavored Applicationruby/spec
The Ruby Spec Suite aka ruby/specpikacode/EBForeNotification
No more update, please use new pod โEBBannerViewโ ไธๅๆดๆฐ๏ผ่ฏทไฝฟ็จๆฐๅบ https://github.com/pikacode/EBBannerViewdiasks2/pragmatic_segmenter
Pragmatic Segmenter is a rule-based sentence boundary detection gem that works out-of-the-box across many languages.ruby/psych
A libyaml wrapper for Rubywhiteleaf7/narou
Narou.rb - ๅฐ่ชฌๅฎถใซใชใใใฎใใฆใณใญใผใ๏ผ็ธฆๆธใๆดๅฝข๏ผ็ฎก็ใขใใชใKindle๏ผใชใฉใฎ้ปๅญๆธ็ฑ็ซฏๆซ๏ผใงใชใใใ่ชญใๅ ดๅใซ่ถ ไพฟๅฉใงใ๏ผjmettraux/ruote
a ruby workflow engine (dead)sorah/mamiya
Faster deploy tool using tarballs and serfline/line-bot-sdk-ruby
LINE Messaging API SDK for RubyGenshin/PhantomOpenEmoji
POE has been discontinued. Please use emojidex.simukappu/activity_notification
Integrated user activity notifications for Ruby on Railsr7kamura/ruboty
Ruby + Bot = Rubotyko1/rubyhackchallenge
asakusarb/action_args
Controller action arguments parameterizer for Rails 4+ & Ruby 2.0+sue445/jenkins-backup-script
archive jenkins setting and pluginseverpeace/vagrant-mesos
Spin up your Mesos Cluster with Vagrant! (VirtualBox and AWS)nov/openid_connect
OpenID Connect Server & Client Librarywillnet/gimei
random Japanese name and address generatorruby/irb
interactive Rubyincrements/qiita-markdown
Qiita-specified markdown processor.exoego/rspec-openapi
Generate OpenAPI schema from RSpec request specsmatsumotory/rcon
rcon is a lightweight resource virtualization tool for linux processes. This is one-binary.gimite/web-socket-ruby
HTML5 Web Socket server/client implementation in Rubyzaru/webpush
webpush, Encryption Utilities for Web Push protocolr7kamura/autodoc
Generate documentation from your rack application & request-spec.halogenandtoast/oath
Oath is rails authentication made simple. Previously known as Monbannov/paypal-express
Ruby Gem for PayPal Express Checkout APIdtaniwaki/rack-dev-mark
Show dev mark on development envyasslab/sample_apps
๐ Railsใใฅใผใใชใขใซใฎๅ็ซ ใ็ตใใฃใ็ถๆ ใ้ใใใชใใธใใชใงใใshugo/textbringer
An Emacs-like text editor written in Rubyruby/syntax_suggest
Searching for unexpected `end` syntax errors takes a lot of time. Let this gem do it for you!authorNari/g1gc-impl-book
ๅพนๅบ่งฃๅใG1GCใๅฎ่ฃ ็ทจgiginet/xcprofiler
๐ CLI to profile compilation time of Swift projectamatsuda/erd
A Rails engine for drawing your app's ER diagramroma/roma
ROMA: A Distributed Key-Value Store in Rubymischa78/boxroom
Boxroom is a Rails application that aims to be a simple interface for managing and sharing files in a web browser. It lets users create folders and upload, download and share files. Admins can manage users, groups and permissions.ryotarai/infrataster
Infrastructure Behavior Testing Frameworkamatsuda/html5_validators
A gem/plugin for Rails 3, Rails 4, Rails 5, and Rails 6 that enables client-side validation using ActiveModel + HTML5 Form Validationtoshimaru/jekyll-toc
Jekyll plugin which generates a table of contents.gimite/google-spreadsheet-ruby
Ruby library to read/write Google Spreadsheetmizzy/specinfra
Command Execution Framework for serverspec, itamae and so onnov/json-jwt
JSON Web Token and its family (JSON Web Signature, JSON Web Encryption and JSON Web Key) in Rubyamatsuda/i18n_generators
A pack of Rails generators gem plugin that generates Rails 3 and Rails 2 I18n locale files for almost every known locale.kiyoka/fuzzy-string-match
fuzzy string matching library for rubycxn03651/write_xlsx
Rubygem for create excel xlsx filefjordllc/bootcamp
ใใญใฐใฉใใผๅใEใฉใผใใณใฐใทในใใeagletmt/hako
Deploy Docker containercxn03651/writeexcel
ruby gem for Write to a cross-platform Excel binary file.kyuden/banken
Simple and lightweight authorization library for Railstomohiro/airplayer
๐ฅ Command-line AirPlay video client for Apple TVGenki-S/ttnt
Test This, Not That! (Google Summer of Code 2015 project under Ruby on Rails)yohasebe/engtagger
English Part-of-Speech Tagger Library; a Ruby port of Lingua::EN::Taggerruby/gem_rbs_collection
A collection of RBS for gems.nhosoya/omniauth-apple
OmniAuth strategy for Sign In with Applemtsmfm/language_server-ruby
A Ruby Language Server implementationruby/reline
The compatible library with the API of Ruby's stdlib 'readline'Love Open Source and this site? Check out how you can help us