Open-source slash command that watches a PR for review comments and auto-pushes fixes. Inspired by Boris Cherny's /babysit pattern.

RedwoodJS is an opinionated full-stack JavaScript framework that combines React on the frontend with a GraphQL API and Prisma ORM on the backend, optimized for startups and rapid application development.

Open-source slash command that runs git status, commits, pushes, and opens a PR in one shot. Inspired by Boris Cherny's /commit-push-pr setup.

A widely adopted open-source e-commerce platform written in PHP with a rich module marketplace, multi-language support, and a strong European user base.

An open-source headless e-commerce platform built on Symfony and API Platform, designed for developers who need a customizable and API-first commerce solution.

A data visualization library built on D3 and React that provides ready-made, themeable chart components with server-side rendering support.

Lightweight CUDA library for 8-bit and 4-bit quantization, enabling large model fine-tuning and inference on consumer GPUs with minimal accuracy loss.

A WebGL2-powered framework for large-scale data visualization, specializing in geospatial layers, 3D rendering, and composable layer architecture.

A modern charting library that renders responsive, interactive SVG charts with built-in annotations, zooming, and real-time data updates.

A flexible, open-source social networking platform built on Yii2 for creating private communities, intranets, and collaboration spaces within organizations.

A modular open-source ERP and CRM application written in PHP for managing contacts, invoices, orders, inventory, accounting, and more from a single web interface.

A widely adopted rich text editor with a plugin ecosystem covering tables, media, spell check, and more, with integrations for React, Vue, Angular, and vanilla JavaScript.

Stimulus is a JavaScript framework by Basecamp that connects behavior to existing server-rendered HTML via data attributes, without requiring a full client-side rendering layer or build step.

An open-source JavaScript calendar component with drag-and-drop scheduling, multiple views, and framework integrations for React, Vue, and Angular.

Feathers is a lightweight web framework for building real-time applications and REST APIs with Node.js. It provides a service-oriented architecture that works with Express, Koa, or its own HTTP transport.

A cross-platform desktop app bundling dozens of developer utilities like JSON formatting, Base64 encoding, hash generation, and regex testing in one tool.

A code editor library for the web, with a modular extension system, mobile support, accessibility features, and language packages for dozens of syntaxes.

A persistence framework that maps SQL statements to Java methods, giving developers full control over queries while eliminating most JDBC boilerplate.

Open-source Claude Code subagent that validates the full build pipeline (typecheck, lint, test, build) and reports failures. Inspired by Boris Cherny.

The foremost open-source network protocol analyzer for capturing, inspecting, and troubleshooting network traffic in real time.

A powerful multi-protocol VPN server and client supporting SSL-VPN, L2TP/IPsec, OpenVPN, and SSTP in a single unified solution.

A browser-based tool that renders OpenAPI specifications as interactive API documentation where developers can explore endpoints and execute requests directly.

Layers swarm and hive-mind multi-agent orchestration on top of Claude Code with 64 specialized agents, SQLite memory, and parallel execution.

Adds 16+ slash commands, 9 cognitive personas, and a smart flag system to Claude Code in one pipx install.

A high-performance open-source network intrusion detection and prevention engine with multi-threaded packet processing and protocol analysis.

Apache Thrift is a software framework for building scalable cross-language services. It combines a code generation engine with an interface definition language to create efficient RPC clients and servers in C++, Java, Python, Go, and 20+ other languages.

A Java library that plugs into the compiler to generate getters, setters, builders, constructors, and more through simple annotations.

A Kubernetes-native Java framework by Red Hat tailored for GraalVM native images and HotSpot, delivering fast startup and low memory usage for microservices.

Open-source slash command for recurring local Claude Code tasks with a 3-day safety cap. Inspired by Boris Cherny's /loop scheduler.

Flash Attention is a CUDA kernel library that computes exact scaled dot-product attention 2-4x faster and with up to 20x less memory than standard implementations by using IO-aware tiling to minimize GPU memory reads and writes.

A collection of expressive, composable React visualization components built on D3, created by Airbnb for building custom data visualizations.

Numba is an open-source JIT compiler that translates Python and NumPy code into fast machine code using LLVM. It accelerates numerical functions by orders of magnitude with minimal code changes.

A free web app that combines documentation for hundreds of developer APIs and languages in a fast, searchable, offline-capable interface.

Open-source slash command that splits a migration across parallel git worktrees. Inspired by Boris Cherny's /batch worktree pattern.

A free, open-source online accounting application built on Laravel for small businesses and freelancers to manage invoices, expenses, and financial reports.

Kornia is a differentiable computer vision library built on PyTorch that provides GPU-accelerated implementations of classical vision algorithms including geometric transforms, color conversions, filtering, feature detection, and augmentations, all with full autograd support for end-to-end learning.

A modified browser that displays a web page on multiple device viewports simultaneously with synchronized scrolling, clicking, and navigation for responsive web development.

An open-source tool by Google that audits web pages for performance, accessibility, SEO, and best practices, available in Chrome DevTools, as a CLI, and as a Node module.

A FreeBSD-based open-source firewall and router platform with a web management interface for securing and routing network traffic.

ImageMagick is a free, open-source software suite for creating, editing, compositing, and converting images. It supports over 200 image formats including PNG, JPEG, TIFF, WebP, SVG, and PDF.

Seaborn is a Python data visualization library built on top of Matplotlib that provides a high-level interface for drawing attractive and informative statistical graphics with minimal code.

Cython is an optimizing static compiler that translates Python-like code into C, producing extension modules that run at native speed. It is used to build high-performance libraries and to wrap existing C/C++ code for Python access.

Official Anthropic plugin that turns Claude Code into an autonomous loop. Adds /ralph-loop and /cancel-ralph for long-running self-improving task execution.

Anthropic's open-source post-task cleanup agent that Boris Cherny runs after every Claude Code session. Refactors for clarity without changing behavior.

Open-source Tauri/Rust desktop app for managing Claude Code sessions, custom agents, sandboxed execution, and checkpoints.

Open-source slash command that chains verify-app + code-simplifier + open-PR in sequence. Inspired by Boris Cherny's /go shortcut.

Open-source Claude Code subagent for incident response — walks the oncall checklist autonomously: deploys, errors, rollback. Inspired by Boris Cherny.

Falcon is a bare-metal Python web framework for building fast APIs and app backends with minimal overhead and direct control over the request-response cycle.

CLI that reads ~/.claude logs and breaks down Claude Code token spend by day, session, and project — pluggable into your statusline.

Open-source Claude Code subagent that pulls recent Sentry errors via MCP, groups by component, and suggests fix priorities. Inspired by Boris Cherny.