Web Bluetooth API-style BLE interface for Ruby.

Ruby FFI bindings for robust Clipper2 polygon clipping, offsets, and GPU-ready triangulation.

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

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

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

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

Ruby bindings for HarfBuzz text shaping engine

Generated Ruby bindings for Dear ImGui with an idiomatic API, exception-safe DSL, GLFW/SDL3/OpenGL/WebGPU backends, and ImPlot.

Strict JSON5 1.0.0 parser in Pure Ruby with generated grammar, diagnostics, limits, and lossless Document mode.

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

A Pure Ruby Markdown linter and formatter.

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

Hybrid dead-code detection for Ruby projects.

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

Detect PostgreSQL and MySQL session-state leaks in Active Record connection pools.

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

Dependency-free Ruby library for loading and writing glTF 2.0 and GLB with GPU-ready packed accessors.

Detect ignored ActiveRecord rollbacks in joined nested transactions

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

Headless terminal emulator library for Ruby.

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

象算木之法，以字畫示整數加減之程

Fast JSON Schema validator for Ruby.

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

RuboCop runner for Ruby code embedded in Slim.

A three.js-like scene graph and WebGPU renderer for Ruby, with PBR, glTF, animation, shadows, and offscreen rendering.

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.

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

A custom cop collection of working toolkits.

Ruby bindings for the Assimp 5.x asset import library

Idiomatic, memory-safe Ruby bindings for Box2D v3

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

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

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

Ruby-native lexer generator for parser authors. Write ordinary Ruby specs, run them at runtime, or generate deterministic Ruby for deployment.

Pure Ruby FFI bindings for GLFW 3.3/3.4.

A differentiable 3D Gaussian splatting renderer and trainer for Ruby, with Numo::NArray and optional OpenMP acceleration.

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

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

Research-backed safe regression test selection and fast test feedback for Ruby.

Generate Mermaid diagrams from Rails models and controllers.

A fast, Prism-native Ruby linter

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

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 library and CLI for reading, composing, editing, and writing OpenUSD USDA and USDZ assets.

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

A Ruby FFI binding for PortAudio v19.

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

Ruby JSON processor with a practical jq 1.7.1-compatible subset, CLI, and Ruby API.

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

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

A RuboCop extension focused on enforcing committee.

Functional, command-oriented OpenGL for Ruby.

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

Generate beautiful terminal screenshots from YAML.

Ruby bindings for the Skia 2D graphics library.

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

Texture-oriented image decoding, conversion, resizing, and GPU upload helpers for Ruby.

Catch Active Record transactions napping—detect non-database idle gaps while locks may be held.

Building audio-reactive visuals with a Ruby DSL.

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

Fast Prism-native AST traversal, declarative matching, and source rewriting for Ruby

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

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

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

Ruby FFI bindings for FreeType 2.11+, with SDF atlases and HarfBuzz text meshes.

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

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。

Pure Ruby LR parser generator with racc-compatible grammars, EBNF extensions, diagnostics, and SLR/LALR/LR(1) backends.

Ruby bindings for Jolt Physics, powered by joltc, FFI, and larb

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

Frame-level Ruby bindings for FFmpeg video and audio encoding/decoding without subprocesses.

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

Simple YAML Frontmatter Parser

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

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

Ruby bindings for RenderDoc's in-application API, with programmatic GPU frame capture and RSpec integration.

Catch Active Record objects whose database writes rolled back while their in-memory state stayed changed.

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

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

A RuboCop Extension Template.

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.

Japanese seasonal and lunisolar calendar calculations in Ruby: 24 solar terms, 72 microseasons, observances, new moons, and date conversion.

Battery-included monitoring and alerting for Sidekiq

A slim file to minify embedded code.

A minimal LLM implemented in pure Ruby

Ruby FFI bindings for libusb 1.0.

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

Ruby bindings for WebGPU via wgpu-native.