01Open source
Repos
Open-source repos worth knowing, by the problem they take on.
Web & Frontend
Prehistoric Animal Museum
A free, open-source, bilingual 3D museum where young children can explore prehistoric animals with narration and a parent guide. It is notable as an educational 3D project, though its audience is niche.
PDFX PDF Processor
PDFx is a desktop application that provides a free-floating 2D canvas for viewing, rearranging, and combining multiple PDF files and images simultaneously. It is notable for its novel visual approach to multi-document PDF handling.
SaaS Boilerplate
SaaS Boilerplate is an open-source starter stack using React, Django, and AWS to build SaaS products faster. It is a solid, full-stack boilerplate but not specifically novel or frontend-focused.
WebGL Effects Library
VFX-JS is a JavaScript library that adds WebGL-powered shader effects to HTML elements like images and videos, with React bindings and prebuilt effects. It simplifies WebGL visual effects for frontend creative work.
JavaScript Library Creator
Rslib is a build tool for JavaScript and UI component libraries based on Rsbuild. It offers zero-config setup, semantic configurations, and integrated build/debug/document/test workflows; fresh from the rstack team.
Clojure Routing Library
Reitit is a fast, data-driven routing library for Clojure and ClojureScript. It provides bidirectional routing, route data, pluggable coercion, and conflict resolution; it is a solid, well-maintained choice for Clojure web apps.
MCP UI Framework
mcp-ui is an SDK for building interactive web UIs over the Model Context Protocol, with packages implementing the MCP Apps standard. It pioneered UI-over-MCP patterns that influenced the MCP Apps specification, making it notable for AI-frontend integration.
Angular Mocking Library
ng-mocks is an Angular testing library for mocking components, directives, pipes, and services, and simplifying TestBed setup. It is actively maintained and considered essential for Angular unit testing.
Django Template Components
django-components is a modular UI framework for Django that enables reusable template components, combining Django's templating with component patterns from Vue or React. It supports server-rendered frontend development across Django projects.
Trendyol Design System
Baklava is Trendyol's design system implemented as native web components, usable in Vue, React, Angular, or any framework via CDN. It provides a production-ready UI toolkit built with Lit for consistent user experiences.
Skylight Aircraft Projector
Decodes ADS-B signals from an RTL-SDR and projects passing aircraft onto a ceiling in real time, labeled with airline and destination, along with sun, moon, stars, and satellites. Notable as a unique hardware-software project with active development.
Materialious YouTube Frontend
Materialious is a material design frontend for YouTube and Invidious that offers a clean, privacy-friendly experience with optional encrypted account syncing and local video fallback. It is available on web, desktop, Android, and Android TV, and is actively maintained.
Oruga UI Library
Oruga is a lightweight Vue.js UI component library that has no CSS dependency, allowing integration with any CSS framework or custom styles. It is actively developed and focuses on functional, customizable components.
Breakscale System Simulator
Breakscale is a system design simulator where users build distributed systems on a canvas, load them until failure, and observe real queueing, latency, and circuit breaker behavior from discrete-event simulation. It is an educational tool gaining traction.
Backbone Marionette Framework
Backbone.Marionette is the classic Backbone.js framework, now in version 4, but future feature development is moving to a separate 'marionette' library that drops the Backbone dependency. It is still maintained mainly for legacy applications.
Aurelia Framework
Aurelia 2 is a standards-based front-end JavaScript framework for building browser, mobile, and desktop applications with minimal framework intrusion. It is actively maintained but has a smaller community compared to other frameworks.
React Font Awesome
Official React component that renders Font Awesome icons as SVG with JavaScript, providing an API for using Font Awesome in React apps. It is the essential, well-maintained wrapper for the icon library.
Reagent React Interface
Reagent is a minimalistic ClojureScript interface to React, enabling efficient React components with plain ClojureScript functions. It is notable as a maintained, minimal wrapper for Clojure developers.
OpenFL Creative Library
OpenFL is an open-source creative library for web, desktop, mobile, and consoles, inspired by Flash and AIR APIs and built with Haxe. It is a legacy but maintained cross-platform tool.
Feature Sliced Design
Feature-Sliced Design is an architectural methodology for frontend projects, organizing code by layers, slices, and segments regardless of stack. It is notable as a documentation resource for frontend architecture.
Image to CSS
Img2css converts any image to pure CSS by recreating pixels as box-shadows on a single div, eliminating img tags. It is a clever but narrow utility.
PlayCanvas Editor
PlayCanvas Editor is a browser-based visual editor for building WebGL, WebGPU, and WebXR apps. It includes MCP integration for AI-assisted development, making it a solid tool for web graphics.
Onlook AI Designer
Onlook is an open-source AI-first visual editor for building and styling React apps directly on your codebase. It is notable for its AI design-to-code approach and strong momentum.
TinyVue UI Library
TinyVue is an enterprise Vue component library supporting Vue 2 and 3, PC and mobile, with 104 components, i18n, and theming. It is notable for headless/renderless support and a cross-framework architecture.