pavilion

React is the foundational UI library powering millions of web applications. It lets you build interfaces by thinking in components and describing what each state should look like. The ecosystem around React—tooling, frameworks, and extensions—is unmatched in scale.

Next.js combines React with server rendering, static generation, and API routes to build full-stack applications. Used by major companies worldwide, it integrates Rust-based tooling for significantly faster builds. The framework handles both frontend and backend needs in one cohesive setup.

Excalidraw is integrated by Google Cloud, Meta, Notion, and others for architectural diagrams and wireframing. The npm package lets you embed the editor directly into your own apps, while excalidraw.com provides a full-featured collaborative instance with real-time sync and shareable links. Being open-source and MIT-licensed, you can customize it extensively.

shadcn/ui provides a curated set of accessible components built on Radix UI and styled with Tailwind CSS. Rather than installing as a dependency, you copy components into your codebase for full ownership and customization. It's become the go-to foundation for teams building design systems.

MarkItDown converts diverse file formats into clean Markdown optimized for LLM consumption, preserving document structure like headings, tables, and lists. It's designed for text analysis pipelines rather than human-readable formatting, with modular dependencies and plugin support. The tool integrates with Azure Document Intelligence and LLM vision models for advanced processing.

Whisper is a production-grade speech recognition model trained on 680k hours of multilingual audio from the web. It handles accents, background noise, and technical language without fine-tuning. Works as both a Python library and CLI tool with multiple model sizes—use tiny for edge devices or large for maximum accuracy.

FastAPI is used at Microsoft, Uber, and Netflix for building production APIs. It combines Starlette and Pydantic to deliver high performance with minimal boilerplate. Automatic validation and documentation make it exceptional for rapid API development.

Tailwind lets you build UIs by composing utility classes instead of writing CSS. It's become the default choice for rapid prototyping and production apps, with a massive ecosystem of plugins and integrations. The CLI provides a zero-config setup for most projects.

Mermaid solves documentation rot by letting developers and non-programmers create diagrams as easily as writing markdown. With 87k+ stars and integration across GitHub, documentation platforms, and popular apps, it's the industry standard for diagram-as-code. Active development and strong community make it production-ready.

Chart.js is a mature, widely-adopted charting library trusted by thousands of projects. It balances simplicity with flexibility, letting designers and developers create responsive visualizations without heavy dependencies. Active maintenance and comprehensive documentation make it production-ready.

Zustand is a minimal state management library that replaces Redux boilerplate with a straightforward hook-based API. It handles React's concurrent rendering pitfalls out of the box and doesn't require context providers, making it a solid choice if you want state management without the framework overhead.

TanStack Query eliminates boilerplate for server state management across React, Vue, Solid, and Svelte. It handles caching, synchronization, and refetching automatically, letting you focus on UI instead of async state plumbing. The library's battle-tested patterns for pagination, mutations, and background updates make it the standard for data fetching in modern web apps.

Battle-tested production library with models like XTTS that handle 16 languages and stream with sub-200ms latency. Includes multiple spectrogram and end-to-end architectures (Tacotron, Glow-TTS, VITS, Bark) plus comprehensive training utilities for dataset curation and model development.

Zod is the go-to schema validation library for TypeScript projects. Define your schema once and get full type safety at parse time—no separate type definitions needed. The API is minimal and immutable, making it easy to compose complex validations while keeping your code readable.

tRPC eliminates the API contract problem by sharing TypeScript types between client and server without code generation or schema overhead. No boilerplate, instant autocompletion, and request batching built in. Used in production by thousands of full-stack teams building Next.js and Node applications.

Bark is a transformer-based text-to-audio model that generates realistic multilingual speech plus music and sound effects. It includes 100+ voice presets and works with GPU/CPU acceleration. MIT-licensed for commercial use.

date-fns is like Lodash for dates—a modular toolset of 200+ functions that work with native JavaScript Date objects. It's built on immutable pure functions and has first-class timezone support as of v4.0. The library is tree-shakeable, fully typed in TypeScript, and supports dozens of locales.

Formik handles the boilerplate that comes with form state management in React. It provides built-in support for validation, error handling, and multiple rendering patterns so you spend less time on form infrastructure.

Drizzle is a lean, TypeScript-first ORM that works across PostgreSQL, MySQL, and SQLite—including serverless databases. It ships with zero dependencies, runs in any JavaScript runtime, and includes Drizzle Kit for migrations and Drizzle Studio for data management. The type safety translates SQL schemas directly into TypeScript, giving you compile-time guarantees without the overhead of heavier ORMs.

Remix 3 is a ground-up redesign optimized for AI-assisted development and runtime portability. Every package follows single-responsibility principles and works standalone, making the framework highly modular and composable. Built entirely on Web APIs rather than Node.js-specific abstractions, your code stays portable across any JavaScript runtime.

Open-Sora is a fully open-source video generation framework with training code and model checkpoints available. The 2.0 release (11B) matches performance of larger proprietary models while being trainable with just $200K in compute. Includes Gradio UI, ColossalAI acceleration, and support for variable resolution and duration.

Pydantic is the industry standard for data validation in Python, used across FastAPI, LLM frameworks, and enterprise applications. V2 is a complete rewrite with major performance improvements and new features while maintaining backward compatibility through built-in V1 support. Define schemas in pure Python and let Pydantic handle parsing, validation, and serialization automatically.

Clay is a single 4.8k LOC header file that delivers microsecond layout performance with zero dependencies. It uses static arena-based memory allocation with no malloc/free, making it ideal for performance-critical applications. Supports both native and WebAssembly compilation with a React-like declarative syntax.

RealtimeSTT handles microphone input and transcribes it instantly with integrated voice activity detection and wake word support. Built on industry-standard components (Faster Whisper, SileroVAD, Porcupine), it's designed for voice assistants and real-time applications. The library exposes a simple callback-based API while offering Docker and CLI interfaces for server deployments.

EmulatorJS is a JavaScript library that brings retro gaming to the web, supporting dozens of legacy systems through RetroArch cores. You can embed it in your own projects or run the official demo, with three versioning tiers so you can choose between stability and bleeding-edge features. Built for self-hosting, it requires no Docker and integrates as a library into existing web applications.

Fabric API provides essential hooks and interoperability for Minecraft mod development. It handles tedious tasks like registry sync and crash reporting while exposing functionality difficult to access directly. Developers can include the full library or cherry-pick individual modules based on their needs.

NeoForge is a free, community-driven modding API that lets you create and install mods directly through the Minecraft launcher. It's actively maintained with straightforward setup—just download the installer, run it, and create a new profile to play with mods.