Frontend GitHub Repositories (2026) · Open Source Tools

Angular testing library for mocking components, directives, pipes, services and facilitating TestBed setup

Browser-based screenshot & video beautifier — backgrounds, device frames, shadows, text and annotations, exported on-device as PNG, WebP, or MP4

A tutorial on infinite canvas

A modern UI card system for Home Assistant focused on clean design, smooth interactions and real usability.

material is a library of web components that helps build beautiful and accessible web applications. It uses Material 3, the latest version of Google's open-source design system.

Interactive motion, written in CSS. Tilt, parallax, magnetic, drag, and scroll effects as CSS properties, animated with springs. 14 KB, no dependencies.

Build SwiftUI-style apps that run in the browser

This is the repo for Vue 2. For Vue 3, go to https://github.com/vuejs/core

Next generation frontend tooling. It's fast!

A powerful cross-platform UI toolkit for building native-quality iOS, Android, and Progressive Web Apps with HTML, CSS, and JavaScript.

An open-source engine that turns continuous content streams into search and monitoring. Durable ingestion, hybrid search, alerts, and plugins for formats, models and business rules.

Angular UI Component Library based on Ant Design

Hippy is designed to easily build cross-platform dynamic apps. 👏

High-performance engine for capturing, modifying, and converting DOM elements into any format.

Visual builder for React. Build apps, websites, and content. Integrate with your codebase.

🐤 The friendly full-stack language

Rebuild any UI from a reference and prove it with a score. An Agent Skill for Claude Code and other coding agents: captures a site, screenshot or screen recording, then scores the clone on layout, style, pixels and motion until it passes.

A Datastar Go web frontend framework, code generator and toolchain

Fast, extensible build tool for modern web development

Neo.mjs is a self-evolving software organism: a professional end-to-end AI engineering team whose cross-model swarm inhabits live apps via Neural Link, Active Hybrid GraphRAG, DreamService, and self-healing loops.