A slim file to minify embedded code.

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

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

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

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

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

A RuboCop Extension Template.

Hybrid dead-code detection for Ruby projects.

Pure Ruby bindings for Linux seccomp user notifications

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

Web Bluetooth API-style BLE interface for Ruby.

Observe file, network, and process capabilities used while installing or requiring Ruby gems.

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

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

Detect ignored ActiveRecord rollbacks in joined nested transactions

Report and block unintended syscalls in Ruby builds and tests

Ruby bindings for Linux's file-descriptor-based mount API

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

OpenTelemetry browser and SSR adapters for Funicular, with OTLP and W3C Trace Context support.

Pure Ruby JPEG XL decoder and lossless Modular encoder with no native extensions.

Ruby bindings for HarfBuzz text shaping engine

Idiomatic, memory-safe Ruby bindings for Box2D v3

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

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

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

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

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

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 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

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

RuboCop runner for Ruby code embedded in Slim.

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

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

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

Generate beautiful terminal screenshots from YAML.

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

A custom cop collection of working toolkits.

Check GraphQL-Ruby resolver contracts against Prism-parsed Ruby source before runtime.

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

Simple YAML Frontmatter Parser

A modern, dependency-free Ruby client for the Notion API

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

Deterministic syscall fault injection for Ruby programs using Linux seccomp user notifications.

Battery-included monitoring and alerting for Sidekiq

A small Mackerel metrics client for PicoRuby that validates service or host metric batches before a single verified HTTPS POST.

Ruby bindings for Linux fanotify

Native CRuby bindings for libseccomp with low-level and Ruby-friendly APIs.

Share FactoryBot data safely across RSpec examples

A Prism-based codemod for safely migrating deprecated graphql-ruby APIs without booting the application.

Pure Ruby interface to Linux Pressure Stall Information (PSI)

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

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

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

A fast, Prism-native Ruby linter

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.

象算木之法，以字畫示整數加減之程

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.

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

Building audio-reactive visuals with a Ruby DSL.

Ruby bindings for WebGPU via wgpu-native.

Ruby bindings for the Skia 2D graphics library.

Generate Mermaid diagrams from Rails models and controllers.

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

A RuboCop extension focused on enforcing committee.

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

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

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

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

A Pure Ruby Markdown linter and formatter.

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

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

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

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

Capture legacy Ruby behavior, synthesize portable specifications, and verify replacement implementations with replay and bounded formal checks.

Bounded, browser-local profiler for Funicular and PicoRuby development tooling.

A practical Perl 5 interpreter written in pure Ruby

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

Ruby bindings for the Assimp 5.x asset import library

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.

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

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

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.