Open source. Open possibilities.

Fibonacci sequence visualizer creating aesthetically pleasing mathematical graphics from numerical patterns.

A modern, open-source animation library for JavaScript, React, and Vue, featuring GPU-accelerated performance and a simple API.

LnDrawer is a simple, lightweight, GPU-accelerated on-screen drawing application written in Rust.

Free MIT-licensed React admin and dashboard template built on React 19, CoreUI React components and Vite, with AI-assistant context files (.cursorrules, ARCHITECTURE.md, DEVELOPMENT.md) and a ready-made layout, routing and sidebar skeleton.

Nebular is a customizable Angular UI library based on the Eva Design System, offering 4 visual themes, 35+ Angular UI components, a theming engine with runtime theme switching and CSS custom properties mode, plus Eva Icons SVG support and configurable authentication strategies.

RAWGraphs is an open-source web tool for creating custom vector-based data visualizations from tabular data, built on d3.js. It runs entirely in the browser with no server-side processing, and exports editable SVG output.

Fira Code is a free monospaced font with programming ligatures for common multi-character operators like ->, <=, and :=. It improves code readability without altering the underlying ASCII text.

Elementra UI is a modern React component library featuring 50+ accessible, Tailwind CSS-based components with CLI tools and TypeScript support.

A reveal.js 6.x-based presentation template with responsive design, Markdown slides, and built-in themes. Supports math (KaTeX), speaker notes, PDF export, and automated GitHub Pages deployment. Requires Node.js for development.

Primer CSS is the CSS implementation of GitHub's Primer Design System, distributed as the @primer/css npm package. It provides Sass/SCSS source files with utility classes and component styles for core, product and marketing contexts. The project is now in maintenance (KTLO) mode.

Base Web is a React component library implementing Uber's Base design system, offering modern, responsive UI components with TypeScript support and Styletron-based styling. Currently in maintenance mode.

A React renderer for Three.js that allows building 3D scenes declaratively using reusable components.

A Windows batch image resizer and converter that processes whole folders in one pass, with dimension presets, aspect-ratio locking, JPEG/PNG/WEBP/BMP output, quality control and filename templating.

Decklight is a zero-dependency, agent-native presentation library where presentations are stored as single HTML files. It features plain-text authoring, Keynote-style builds, theme-aware SVG diagrams, and automated verification through headless rendering.

Floem is a native Rust UI library with fine-grained reactivity and an ergonomic declarative API. It targets Windows, macOS and Linux, supporting GPU and CPU rendering, Flexbox/Grid layout, theming, animations and an element inspector.

FontForge is a free and open-source font editor compatible with Windows, Mac OS X, and GNU+Linux for creating and converting various font formats.

Oat is an ultra-lightweight, zero-dependency semantic HTML/CSS/JS UI library (~10KB min+gz). It needs no framework or build step, styles semantic tags contextually without classes, and uses minimal JS WebComponents for dynamic parts.

Alouette is a modern, customizable design system for React and React Native built on NativeWind v5. It provides accessible UI components, tools, and AI agent skills to build consistent interfaces. Includes icon package and demo applications.

Panda is a universal, type-safe CSS-in-JS framework for design systems. It extracts styles at build time, outputs modern CSS with cascade layers and variables, supports recipes and variants, and works with most JS frameworks.

D2 is a modern diagram scripting language that converts text into diagrams. It supports multiple layout engines, themes, and export formats including SVG, PNG, and PDF.