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

Ruby bindings for WebGPU via wgpu-native.

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

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

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

Generate Mermaid diagrams from Rails models and controllers.

Ruby bindings for the Skia 2D graphics library.

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

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.

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.

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 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.

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.

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

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

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

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

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

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

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

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

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

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

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 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 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.

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

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

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

Hybrid dead-code detection for Ruby projects.

A fast, Prism-native Ruby linter

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

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

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.

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.

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.

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.

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.