Detect, record, and classify flaky RSpec failures with normalized signatures, isolated reruns, and CI-friendly reports.

RSpec coverage intent metadata, strict coverage checks, and traceability suggestions.

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

Ruby bindings for the Skia 2D graphics library.

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

A slim file to minify embedded code.

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

象算木之法，以字畫示整數加減之程

A RuboCop Extension Template.

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

Building audio-reactive visuals with a Ruby DSL.

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

Generate beautiful terminal screenshots from YAML.

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

Web Bluetooth API-style BLE interface for Ruby.

Headless terminal emulator library for Ruby.

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

A WebUSB-style API to Ruby applications.

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.

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

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

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

Obituary detects archived GitHub repositories for your RubyGem dependencies.

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

A Ruby CLI for linting and formatting YAML files

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

Generate Mermaid diagrams from Rails models and controllers.

A Ruby gem to sync Markdown files to Notion pages.

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

Detect RSpec examples that leak global state, resources, time travel, randomness, or filesystem changes.

Runtime risky-test detection for RSpec: reports tests with no expectations or unexpected output.

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

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

Simple YAML Frontmatter Parser

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

A terminal slide rule simulator for Ruby, with interactive sandbox, demo, and drill modes.

A custom cop collection of working toolkits.

Ruby bindings for HarfBuzz text shaping engine

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.

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

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

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

Ruby FFI bindings for libusb 1.0.

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

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.

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

Ruby bindings for WebGPU via wgpu-native.

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.

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

Generate Markdown documentation from OpenAPI specifications.

Causal profiling toolkit for Ruby that estimates which lines or waits would actually improve throughput or latency.

Evidence-based test suite adequacy analysis for Ruby, combining coverage, mutation testing, checked coverage, redundancy detection, and test-smell heuristics.

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

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

Decode PicoRuby/R2P2 Cortex-M HardFault logs with matching ELF debug symbols

RuboCop runner for Ruby code embedded in Slim.

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

化学式を解剖し、分子の量を秤り、反応式を釣合はすRubyGemに候

Fast JSON Schema validator for Ruby.

A RuboCop extension focused on enforcing committee.

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。

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

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

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

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

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

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.

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

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.

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

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

Advisory locking for ActiveRecord with modern Rails conventions.

A Pure Ruby Markdown linter and formatter.

Bring harmony to your pull requests.

Ruby bindings for the LLDB debugger.

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.