Best open-source Frontend & UI projects

A .NET framework for building cross-platform 2D and 3D games in C#, re-implementing Microsoft's discontinued XNA Framework.

A drop-in replacement for react-markdown built for rendering streaming Markdown from AI models, including incomplete blocks.

Pure JavaScript/TypeScript library that measures and lays out multiline text without triggering DOM reflow, rendering to DOM, Canvas or SVG.

A browser-based 3D boat journey down a Japanese river valley, rendered live with three.js across four seasons and any hour of the day.

Allocation-free tween library for Unity that animates properties, delays and sequences with one line of code.

A small, dependency-free JavaScript library that lets any HTML element make AJAX, WebSocket and SSE requests through attributes.

A React and Next.js cursor animation library offering reusable cursor-follow effects, built on Tailwind CSS and motion.