Pure Ruby packet analyzer.

🟦 Bluish color scheme for irb

Sample code for RubyConf Taiwan x COSCUP 2025 "Joy with 3D Graphics Using Ruby"

Auto-fix N+1 queries detected by Bullet at runtime.

A programming language compiler using "Grongi language," the language of the Gurongi tribe from Kamen Rider Kuuga (Masked Rider Kuuga).

A Ruby gem for visualizing the cascade deletion impact in Rails applications. BlastRadius helps you understand which records will be deleted when you delete a record, based on ActiveRecord associations with dependent options.

A RuboCop Extension Template.

A multiplayer Tetris game written in Ruby that runs over Telnet. Play classic Tetris against another player in real-time through your terminal.

Generate beautiful terminal screenshots from YAML.

Interactive Bezier curve drawing tool using Ruby2D.

Generate Markdown documentation from OpenAPI specifications.

Simple YAML Frontmatter Parser

A RuboCop extension focused on enforcing RSpec. A place where no one is officially employed, but where useful cops can gather.

List release note diffs.

Calculate the Pascal triangle.

Replay test suite's HTTP interactions as WebMock stubs in RSpec.

Bevy bindings for Ruby, providing ECS-driven game/app architecture, 2D rendering sync, input bridging, and runtime interaction events.

WebRTC bindings for Ruby, providing real-time audio, video, and data channel capabilities.

Convert ASCII/Unicode diagrams into clean SVG and PNG images

A modern static site generator for Ruby with Vite/Tailwind integration.

Regression testing for Ruby APIs, files, and data snapshots. Compare outputs across environments with tolerances and ignore rules.

RuBy Graphics Library - A pure Ruby graphics library with software rendering engine and cross-platform GUI support.

A linter and formatter for Lrama Style BNF grammar files (.y files). Collie helps you write clean, maintainable, and error-free grammar files for parser generators like Lrama, Yacc, and Bison.

RuboCop runner for Ruby code embedded in Slim.

A hobby regex engine written in Ruby. Designed to be simple and efficient for educational purposes.

Parselly is a module providing a simple way to parse and extract data from a css selector 🌿

Search for Cops that can be automatically modified among the Cops listed in .rubocop_todo.yml.

Generate Mermaid diagrams from Rails models and controllers.

A tiny Ruby library for generating finite state machine (automaton) diagrams as SVG.

A pure Ruby library for visualizing automata and state machines. Supports multiple output formats including Mermaid, GraphViz DOT, PlantUML, and interactive HTML.

🎮 A game in which you enter the name of the class and compete for the number of letters on rurima's page.

A RuboCop extension focused on enforcing committee.

Rdeck is a Ruby CLI tool that converts Markdown presentations to Google Slides, enabling continuous deck creation with content and design separation.

A simple Gemfile parser.

Convert log of radeontop to CSV style.

Pure Ruby fast lexer generator.

Ruby bindings for the Skia 2D graphics library.

Licensure is a RubyGem CLI tool that inspects dependency licenses from `Gemfile.lock` and checks them against a configurable allow list.

rspec-rewind is a modern retry orchestration gem for RSpec.

A Pure Ruby Markdown linter and formatter.

Bring harmony to your pull requests.

WebXR Device API bindings for Ruby. Build VR/AR applications in Ruby using ruby.wasm.

A Ruby gem for converting SVG files to PNG images. Can be used as both a CLI tool and a Ruby library.

A slim file to minify embedded code.

🛤️ A tiny Ruby+SVG library for drawing railroad syntax diagrams like JSON.org.

A tool to create mermaid class diagrams from Ruby code.

A visual editor for Lrama grammar files (.y files) powered by Ruby Wasm.

A RuboCop extension focused on enforcing Sidekiq best practices and coding conventions.

A Ruby gem to sync Markdown files to Notion pages.

A custom cop collection of working toolkits.

Ruby bindings for the LLDB debugger.

Ruby Like Shading Language - A Ruby DSL for writing shaders that transpile to multiple GPU shader languages.

Visualizer for checking B-tree behavior.

Convert Mermaid diagrams to SVG files using Puppeteer. Supports both CLI and programmatic usage with batch conversion capabilities.

Lens of Truth to check if the automatic modification by RuboCop is not causing changes in the AST.

Convert PlantUML to Mermaid

Sandbox

A sandbox where you can casually try out capybara.

Ruby bindings for WebGPU via wgpu-native.

Ruby FFI bindings for SDL3 (Simple DirectMedia Layer 3).

Obituary detects archived GitHub repositories for your RubyGem dependencies.

Advisory locking for ActiveRecord with modern Rails conventions.

A Ruby CLI for linting and formatting YAML files

Language Server Protocol (LSP) implementation for Lrama Style BNF grammar files (.y files).