Frontend GitHub Repositories (2026) · Open Source Tools

Agent skills that give coding agents taste: art direction, reference images and a browser check instead of generic AI pages

Lint the rendered UI: catches overflowing text, low contrast, overlaps, broken responsive layouts, emoji icons and more in any web framework. Built for AI coding agents.

An open-source framework for making universal native apps with React. Expo runs on Android, iOS, and the web.

Component layer for AI agents: implementation-aware contracts for building project-native interface components.

The library for web and native user interfaces.

Open source website builder and Webflow alternative. Webstudio is an advanced visual builder that connects to any headless CMS, supports all CSS properties, and can be hosted anywhere, including with us.

AI frontend

RYUX gives AI agents the design intelligence to understand product context, make intentional design decisions, and evaluate what they create.

PocketJS: create UI on every screen you love. JavaScript components drawn as native pixels on handhelds, desktops and embedded screens. Also home to Pocket3D and MicroTS.

Materialious is a modern material design frontend for YouTube & Invidious, focused on a clean, privacy-friendly YouTube experience. It supports local video fallback when Invidious fails and is available on Web, Desktop, Android, and Android TV.

Visual Development for React, Vue, Svelte, Qwik, and more

Create web-based user interfaces with Python. The nice way.

An agent skill that builds award-caliber websites from one line

A rain radar card using the tiled images from RainViewer

An open-source activism platform

200 web animation examples with copy-ready AI prompts + MotionLens: turn any site's animation into a prompt. React, TypeScript, Framer Motion, Three.js

A Claude Code skill that reverse-engineers any animation frame by frame, then proves the copy moves the same.

:lollipop: Frontend for Home Assistant

A modern web interface for managing and controlling your Blocky DNS server.

PlayStation 2 emulator for Android with a PCSX2-based core adapted by EmuCoreX, a modern game library, live overlay controls, and a handheld-focused experience.