Convert ASCII/Unicode diagrams into clean SVG and PNG images

Interactive Bezier curve drawing tool using Ruby2D.

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

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

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

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

🟦 Bluish color scheme for irb

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

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

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

Simple YAML Frontmatter Parser

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

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

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

A RuboCop extension focused on enforcing committee.

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

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

Sandbox

Ruby bindings for the Skia 2D graphics library.

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

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

A Ruby CLI for linting and formatting YAML files

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

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.

Calculate the Pascal triangle.

Pure Ruby fast lexer generator.

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

Advisory locking for ActiveRecord with modern Rails conventions.

Ruby bindings for the LLDB debugger.

A Pure Ruby Markdown linter and formatter.

Bring harmony to your pull requests.

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

Convert log of radeontop to CSV style.

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

List release note diffs.

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

A RuboCop Extension Template.

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

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

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

A slim file to minify embedded code.

A Ruby gem to sync Markdown files to Notion pages.

Generate Markdown documentation from OpenAPI specifications.

Ruby bindings for WebGPU via wgpu-native.

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

Visualizer for checking B-tree behavior.

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.

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

A simple Gemfile parser.

Generate Mermaid diagrams from Rails models and controllers.

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

A tool to create mermaid class diagrams from Ruby code.

Obituary detects archived GitHub repositories for your RubyGem dependencies.

Convert PlantUML to Mermaid

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

Pure Ruby packet analyzer.

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

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

A sandbox where you can casually try out capybara.

Generate beautiful terminal screenshots from YAML.

RuboCop runner for Ruby code embedded in Slim.

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

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

A custom cop collection of working toolkits.