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.

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

Building audio-reactive visuals with a Ruby DSL.

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

Convert ASCII/Unicode diagrams into clean SVG and PNG images

A Pure Ruby Markdown linter and formatter.

Bring harmony to your pull requests.

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

Ruby FFI bindings for libusb 1.0.

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

Pure Ruby FFI bindings for GLFW 3.3/3.4.

Functional, command-oriented OpenGL for Ruby.

Convert PlantUML to Mermaid

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

Visualizer for checking B-tree behavior.

Generate Markdown documentation from OpenAPI specifications.

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

Simple YAML Frontmatter Parser

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

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

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.

A RuboCop extension focused on enforcing committee.

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

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

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

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

Pure Ruby packet analyzer.

Headless terminal emulator library for Ruby.

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

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

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

Advisory locking for ActiveRecord with modern Rails conventions.

A Ruby CLI for linting and formatting YAML files

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

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.

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

A Ruby FFI binding for PortAudio v19.

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

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

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

Pure Ruby fast lexer generator.

Sandbox

Ruby bindings for the Skia 2D graphics library.

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

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

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

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 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.

Generate beautiful terminal screenshots from YAML.

A Ruby gem to sync Markdown files to Notion pages.

Generate Mermaid diagrams from Rails models and controllers.

A tool to create mermaid class diagrams from Ruby code.

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.

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

Ruby bindings for HarfBuzz text shaping engine

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

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

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.

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 WebUSB-style API to Ruby applications.

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

A Ruby toolkit for building small scores with a Ruby DSL and exporting them to PDF, SVG, or MIDI.

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

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

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

A sandbox where you can casually try out capybara.

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

Interactive Bezier curve drawing tool using Ruby2D.

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

Ruby bindings for WebGPU via wgpu-native.

A minimal LLM implemented in pure Ruby

Web Bluetooth API-style BLE interface for Ruby.

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

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

Ruby bindings for the LLDB debugger.

A custom cop collection of working toolkits.

Obituary detects archived GitHub repositories for your RubyGem dependencies.

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

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

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

🟦 Bluish color scheme for irb

RuboCop runner for Ruby code embedded in Slim.