Dany Castillo

chrome-devtools-mcp. Chrome DevTools for coding agents

perfect-freehand. Draw perfect pressure-sensitive freehand lines.

tldraw-offline. A desktop app for using tldraw with local files.

tokenx. 📐 Fast token estimation with 95%+ average accuracy in a 2kB bundle

cli. Google Workspace CLI — one command-line tool for Drive, Gmail, Calendar, Sheets, Docs, Chat, Admin, and more. Dynamically built from Google Discovery Service. Includes AI agent skills.

fnm. 🚀 Fast and simple Node.js version manager, built in Rust

pierre. pierre’s open source code

Rezi. Build TypeScript TUI backed by fast native rendering engine

AudioPriorityBar. A native macOS menu bar app for managing audio device priorities

hotkeys. Type-Safe keyboard shortcuts library with awesome devtools

openclaw. Your own personal AI assistant. Any OS. Any Platform. The lobster way. 🦞

streamdown. A drop-in replacement for react-markdown, designed for AI-powered streaming.

gemini-cli. An open-source AI agent that brings the power of Gemini directly into your terminal.

nn-zero-to-hero. Neural Networks: Zero to Hero

codex. Lightweight coding agent that runs in your terminal

github-mcp-server. GitHub's official MCP Server

slack-mcp-server. The most powerful MCP Slack Server with no permission requirements, Apps support, GovSlack, DMs, Group DMs and smart history fetch logic.

qmd. mini cli search engine for your docs, knowledge bases, meeting notes, whatever. Tracking current sota approaches while being all local

spec. The canonical spec for ulid

bun. Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one

claude-code-infrastructure-showcase. Examples of my Claude Code infrastructure with skill auto-activation, hooks, and agents

pm2. Node.js/Bun Production Process Manager with a built-in Load Balancer.

claude-code. Claude Code is an agentic coding tool that lives in your terminal, understands your codebase, and helps you code faster by executing routine tasks, explaining complex code, and handling git workflows - all through natural language commands.

PowerToys. Microsoft PowerToys is a collection of utilities that supercharge productivity and customization on Windows

starship. ☄🌌️ The minimal, blazing-fast, and infinitely customizable prompt for any shell!

studi. Utility to set the brightness of Apple Studio Displays from Windows or Linux

mitmproxy. An interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers.

remember-promise. Remembering promises that were made!

promise-fun. Promise packages, patterns, chat, and tutorials

tsdown. The elegant bundler for libraries powered by Rolldown

awesome. 😎 Awesome lists about all kinds of interesting topics

any-distance-ios. Swift

alien-signals. 👾 The lightest signal library

legend-state. Legend-State is a super fast and powerful state library that enables fine-grained reactivity and easy automatic persistence

reverse-linear-sync-engine. A reverse engineering of Linear's sync engine. Endorsed by Linear CTO.

pnpm. Fast, disk space efficient package manager

javascript. Universally Unique Lexicographically Sortable Identifier

yoctocolors. The smallest and fastest command-line coloring package on the internet

typescript-go. Staging repo for development of native port of TypeScript

corner-smoothing.  Apple-like smooth corners for Tailwind CSS.

campsite. The Campsite monorepo

factorio-blueprint-visualizer. A python library to artfully visualize Factorio Blueprints and an interactive web demo for using it.

noc-book-2. The 2024 edition of The Nature of Code with p5.js. Includes Notion workflow and build system.

fish-shell. The user-friendly command line shell.

tz. date-fns timezone utils

base-ui. Unstyled UI components for building accessible web apps and design systems. From the creators of Radix, Floating UI, and Material UI.

deno-dom. Browser DOM & HTML parser in Deno

ink. 🌈 React for interactive command-line apps

spacetime. A lightweight javascript timezone library

package-info. VS code extension

tini. A tiny but valid `init` for containers

bluesky-tech-starter-packs. A list of tech-related Bluesky starter packs

Fraction.js. The RAW rational numbers library written in JavaScript

social-app. The Bluesky Social application for Web, iOS, and Android

LLM101n. LLM101n: Let's build a Storyteller

wireit. Wireit upgrades your npm/pnpm/yarn scripts to make them smarter and more efficient.

I-Still-Dont-Care-About-Cookies. Debloated fork of the extension "I don't care about cookies"

OpenScanner. Fast, reliable, and free document scanner app for iPhone

proposal-temporal. Provides standard objects and functions for working with dates and times.

tsup. The simplest and fastest way to bundle your TypeScript libraries.

delta. A syntax-highlighting pager for git, diff, grep, rg --json, and blame output

www-server-mono. Server Mono is a typeface inspired by typewriters, Apple's San Francisco Mono, ASCII art, command-line interfaces, and programming tools.

tinybench. 🔎 A simple, tiny and lightweight benchmarking library!

shadergradient. Create beautiful moving gradients on Framer, Figma and React

tsc-shame. Shame your node_modules type checking speed

es-toolkit. A modern JavaScript utility library that's 2-3 times faster and up to 97% smaller—a major upgrade to lodash.

effect. Build production-ready applications in TypeScript

visualisations. Code behind my visualisation blog posts

TelegramSwift. Source code of Telegram for macos on Swift 5.0

foss-fund. The Microsoft FOSS Fund provides a direct way for Microsoft engineers to participate in the nomination and selection process to help communities and projects they are passionate about. The FOSS Fund provides sponsorships to open source projects as selected by Microsoft employees.

npm-stat.com. download statistics for npm packages

victory. A collection of composable React components for building interactive data visualizations

color.js. Color conversion & manipulation library by the editors of the CSS Color specifications

whisper. Robust Speech Recognition via Large-Scale Weak Supervision

nanoGPT. The simplest, fastest repository for training/finetuning medium-sized GPTs.

neural-networks-and-deep-learning. Code samples for my book "Neural Networks and Deep Learning"

proposal-signals. A proposal to add signals to JavaScript.

pragmatic-drag-and-drop. Fast drag and drop for any experience on any tech stack

commit-mono. Commit Mono is an anonymous and neutral programming typeface.

tailwind-merge-go. Merge Tailwind CSS classes without style conflicts in Go

rolldown. Fast Rust bundler for JavaScript/TypeScript with Rollup-compatible API.

professional-programming. A collection of learning resources for curious software engineers

icloud-hide-my-email-browser-extension. Enjoy iCloud's Hide My Email service in your favourite browser

gitbutler. The GitButler version control client, backed by Git, powered by Tauri/Rust/Svelte

lucide. Beautiful & consistent icon toolkit made by the community. Open-source project and a fork of Feather Icons.

create-rust-app. Set up a modern rust+react web app by running one command.

slate. A completely customizable framework for building rich text editors. (Currently in beta.)

prosekit. Framework agnostic and headless rich text editor

advent-of-code-rust. 🎄Starter template for solving Advent of Code in Rust.

plate. Rich-text editor with AI and shadcn/ui

tw-merge. Merge utility classes without style conflicts

oxc. ⚓ A collection of high-performance JavaScript tools.

tailwindcss-animate. A Tailwind CSS plugin for creating beautiful animations

stylex. StyleX is the styling system for ambitious user interfaces.

the-super-tiny-compiler. :snowman: Possibly the smallest compiler ever

algorithms. Bug-tracking for Jeff's algorithms book, notes, etc.

geist-font. HTML

scalar. Scalar is an open-source API platform:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　🌐 Modern REST API Client　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　📖 Beautiful API References　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　✨ 1st-Class OpenAPI/Swagger Support

tailwindcss-unimportant. Adds lower specificity utility classes to be used in components

react-spectrum. A collection of libraries and tools that help you build adaptive, accessible, and robust user experiences.

jotai. 👻 Primitive and flexible state management for React

pretty-ts-errors. 🔵 Make TypeScript errors prettier and human-readable in VSCode 🎀

hocuspocus. The Yjs CRDT WebSocket backend for conflict-free real-time collaboration in your app.

the-algorithm. Source code for the X Recommendation Algorithm

chrono. A natural language date parser in Javascript

pure. Pretty, minimal and fast ZSH prompt

motion. A modern animation library for React and JavaScript

sonner. An opinionated toast component for React.

floating-ui. A JavaScript library to position floating elements and create interactions for them.

react-email. 💌 Build and send emails using React

ts-reset. A 'CSS reset' for TypeScript, improving types for common JavaScript API's

open-ui. Maintain an open standard for UI and promote its adherence and adoption.

notion-sdk-js. Official Notion JavaScript Client

vesper. Peppermint and orange flavored dark theme for VSCode.

nextra. Simple, powerful and flexible site generation framework with everything you love from Next.js.

pkg. Package your Node.js project into an executable

typewind. The safety of Typescript with the magic of Tailwind.

vscode-definition-filter. Filter any user-specified typescript definition.

typia. Super-fast/easy runtime validators and serializers via transformation

cva. Class Variance Authority

solid. A declarative, efficient, and flexible JavaScript library for building user interfaces.

react-wrap-balancer. Simple React Component That Makes Titles More Readable

ts-pattern. 🎨 The exhaustive Pattern Matching library for TypeScript, with smart type inference.

extensions. Everything you need to extend Raycast.

mastodon. Your self-hosted, globally interconnected microblogging community

uBlock. uBlock Origin - An efficient blocker for Chromium and Firefox. Fast and lean.

orchid. Orchestrator for promise based tasks in typescript

date-fns. ⏳ Modern JavaScript date utility library ⌛️

simplex-noise.js. A fast simplex noise implementation in Javascript / Typescript.

git. Git Source Code Mirror - This is a publish-only repository but pull requests can be turned into patches to the mailing list via GitGitGadget (https://gitgitgadget.github.io/). Please follow Documentation/SubmittingPatches procedure for any of your improvements.

react-on-lambda. A JavaScript library for building React applications in more functional way. Alternative to JSX.

tailwind_merge. Utility function to efficiently merge Tailwind CSS classes without style conflicts.

graham-essays. 📚 Download the full collection of Paul Graham essays in EPUB, PDF & Markdown for easy reading.

fluentui-emoji. A collection of familiar, friendly, and modern emoji from Microsoft

DPP. Deep Persistent Proxy Objects for JavaScript

fd. A simple, fast and user-friendly alternative to 'find'

camelcase-keys. Convert object keys to camel case

type-fest. A collection of essential TypeScript types

fuzzysort. Fast SublimeText-like fuzzy search for JavaScript.

stitches. [Not Actively Maintained] CSS-in-JS with near-zero runtime, SSR, multi-variant support, and a best-in-class developer experience.

click-to-component. Option+Click React components in your browser to instantly open the source in VS Code

Fuse. Lightweight fuzzy-search, in JavaScript

string-similarity-js. Lightweight string similarity function for javascript

tinykeys. A tiny (~650 B) & modern library for keybindings.

kbar. fast, portable, and extensible cmd+k interface for your site

lexical. Lexical is an extensible text editor framework that provides excellent reliability, accessibility and performance.

mousetrap. Simple library for handling keyboard shortcuts in Javascript

idb. IndexedDB, but with promises

remix. Build Better Websites. Create modern, resilient user experiences with web fundamentals.

spellbook-of-modern-webdev. A Big Picture, Thesaurus, and Taxonomy of Modern JavaScript Web Development

analytics. Open source, privacy-first web analytics. Lightweight, cookie-free Google Analytics alternative. Self-hosted or cloud.

iina. The modern video player for macOS.

swc. Rust-based platform for the Web

tailwind-merge. Merge Tailwind CSS classes without style conflicts

detect-browser. Unpack a browser type and version from the useragent string

color-names. Large list of handpicked color names 🌈

primitives. Radix Primitives is an open-source UI component library for building high-quality, accessible design systems and web apps. Maintained by @workos.

xstate. State machines, statecharts, and actors for complex logic

patch-package. Fix broken node modules instantly 🏃🏽‍♀️💨

smhutch. 🌿 Personal site

cache-cmd. Run and cache a command based on various factors

react-if. 🌗 Render React components conditionally

goober. 🥜 goober, a less than 1KB 🎉 css-in-js alternative with a familiar API

DarkModeBuddy. Switch your Mac's system theme based on the ambient light intensity.

minisearch. Tiny and powerful JavaScript full-text search engine for browser and Node

fractional-indexing. Fractional Indexing in JavaScript

caveat. Caveat handwriting fonts

rust. Empowering everyone to build reliable and efficient software.

book. The Rust Programming Language

deno. A modern runtime for JavaScript and TypeScript.

beachball. The Sunniest Semantic Version Bumper

clsx. A tiny (239B) utility for constructing `className` strings conditionally.

trpc. 🧙‍♀️ Move Fast and Break Nothing. End-to-end typesafe APIs made easy.

hashlru. JavaScript

virtual. 🤖 Headless UI for Virtualizing Large Element Lists in JS/TS, React, Solid, Vue and Svelte

boring-avatars. Boring avatars is an open source React library that generates custom, SVG-based avatars from any username and color palette.

astro. The web framework for content-driven websites. ⭐️ Star to support our work!

replicache. Realtime Sync for Any Backend Stack

io-ts-types. A collection of codecs and combinators for use with io-ts

react-18. Workgroup for React 18 release.

react-beautiful-dnd. Beautiful and accessible drag and drop for lists with React

proposal-partial-application. Proposal to add partial application to ECMAScript

proposal-pipeline-operator. A proposal for adding a useful pipe operator to JavaScript.

fp-ts. Functional programming in TypeScript

ts-node. TypeScript execution and REPL for node.js

visx. 🐯 visx | visualization components

headlessui. Completely unstyled, fully accessible UI components, designed to integrate beautifully with Tailwind CSS.

proposal-record-tuple. ECMAScript proposal for the Record and Tuple value types. | Stage 2: it will change!

terraform. Terraform enables you to safely and predictably create, change, and improve infrastructure. It is a source-available tool that codifies APIs into declarative configuration files that can be shared amongst team members, treated as code, edited, reviewed, and versioned.

slidev. Presentation Slides for Developers

glyphfinder. Unicode character search for macOS & Windows.

flexsearch. Next-generation full-text search library for Browser and Node.js

zx. A tool for writing better scripts

tiptap. The headless rich text editor framework for web artisans.

assemblyscript. A TypeScript-like language for WebAssembly.

emoji-data. Easy to parse data and spritesheets for emoji

vanilla-extract. Zero-runtime Stylesheets-in-TypeScript

clio. Clio is a functional, parallel, distributed programming language.

yjs. Shared data types for building collaborative software

xdm. Just a *really* good MDX compiler. No runtime. With esbuild, Rollup, and webpack plugins