Headless terminal emulator library for Ruby.

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

Pure Ruby FFI bindings for GLFW 3.3/3.4.

Ruby FFI bindings for RtMidi with Ruby-idiomatic MIDI input/output, typed messages, and low-level C API access.

Ruby FFI bindings for libogg, the OGG container format library.

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

落語調の帳場言葉で書く、小さな算譜言語「噺椎」の Ruby 処理系。

Lightweight Ruby toolkit for building small music scores, parsing a LilyPond-style syntax subset, and exporting PDF, SVG, or MIDI.

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

Convert PlantUML to Mermaid

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

Bring harmony to your pull requests.

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

Convert ASCII/Unicode diagrams into clean SVG and PNG images

Generate Markdown documentation from OpenAPI specifications.

A pure Ruby LALR(1) parser generator. You define a grammar with a Ruby DSL, and Rusa generates a standalone Ruby parser with no runtime gem dependency.

A minimal LLM implemented in pure Ruby

Ruby audio feature extraction library with WAV analysis and optional FFTW acceleration.

Simple YAML Frontmatter Parser

Generate beautiful terminal screenshots from YAML.

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

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

A RuboCop extension focused on enforcing committee.

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

Generate Mermaid diagrams from Rails models and controllers.

A tool to create mermaid class diagrams from Ruby code.

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

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

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

Pure Ruby packet analyzer.

lxdb (LLeXtreme DeBugger) is a powerful, pwndbg-style debugger for Ruby built on top of lldb-ruby.

A WebUSB-style API to Ruby applications.

Ruby FFI bindings for the core JACK Audio Connection Kit client APIs.

Ruby FFI bindings for FFTW3 (Fastest Fourier Transform in the West).

Parses Terraform (.tf) files and generates infrastructure design documentation in Markdown format.

Ruby wrapper for Linux `ptrace(2)` focused on building tracers and debugger-like tooling with a Ruby-friendly API.

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

象算木之法，以字畫示整數加減之程

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

A Ruby audio feature extraction library that provides a full pipeline from audio loading to spectral analysis, feature extraction, rhythm analysis, effects, and lightweight visualization.

Pure-Ruby MIDI library for messages, ports, SMF I/O, middleware, network MIDI, and MIDI 2.0 UMP.

A Ruby live coding toolkit for composing musical patterns with rational time and OSC/MIDI output.

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

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

Advisory locking for ActiveRecord with modern Rails conventions.

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

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

Interactive Bezier curve drawing tool using Ruby2D.

A Ruby CLI for linting and formatting YAML files

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

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

A pure Ruby audio processing gem focused on ergonomic APIs and immutable audio transforms.

Ruby bindings for the Skia 2D graphics library.

A RuboCop Extension Template.

A custom cop collection of working toolkits.

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

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

Building audio-reactive visuals with a Ruby DSL.

A cli that highlights gems you can likely remove from a Ruby project's Gemfile.

RuboCop runner for Ruby code embedded in Slim.

A tiny Ruby JIT compiler for learning how bytecode VMs, interpreters, and x86-64 native code generation work.

Ruby FFI bindings for libusb 1.0.

A Ruby FFI binding for PortAudio v19.

Functional, command-oriented OpenGL for Ruby.

Ruby FFI bindings for libvorbis and libvorbisenc. Provides Vorbis audio codec encoding functionality.

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

A linter and formatter for Lrama-style BNF grammar files.

A Ruby audio synthesis library with a flexible node graph, oscillator and synth variants, effects, transport/event scheduling, sample playback, analysis utilities, offline rendering, and an optional PortAudio-backed realtime context.

A small Ruby gem for reading large JSON array, NDJSON, and CSV inputs one record at a time

Ruby bindings for HarfBuzz text shaping engine

A Pure Ruby Markdown linter and formatter.

Educational compiler backend targeting C through printf %n, with Brainfuck and conservative LLVM IR subset frontends.

Web Bluetooth API-style BLE interface for Ruby.

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

A small 2D game engine for PicoRuby and CRuby-based POSIX development.

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

A pure Ruby library for building, reading, and writing Standard MIDI Files (SMF)

Ruby bindings for WebGPU via wgpu-native.

A Ruby gem to sync Markdown files to Notion pages.

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.

Obituary detects archived GitHub repositories for your RubyGem dependencies.

Ruby bindings for the LLDB debugger.

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

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

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

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

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

A slim file to minify embedded code.