Ondine

Mermaid is an open-source diagramming and charting tool that creates diagrams and visualizations from text and code. It includes the Mermaid Live Editor and integrations with other applications, and is developed by an open-source community around the Mermaid.js project and its associated platform.

Pele is a small, synchronous open-source JavaScript library that renders Mermaid diagrams to SVG without runtime dependencies. It supports every diagram type built into Mermaid 12.1.0, exposes render() for generating SVG and mount() for rendering into a browser element, and can load individual diagram types or use lazy rendering to reduce the initial bundle. It uses CSS variables for colors and fonts, escapes diagram text, filters links and styles, and limits source and output size when handling untrusted diagrams. Pele is distributed through npm and a CDN under the MIT license.

Ink Tide is a cel-shaded arcade boat-racing game for the browser, built with Vite, TypeScript, and Three.js. It uses no external assets: meshes, textures, rider animations, and sounds are generated in code. The game runs on an infinite procedural ocean formed from six summed Gerstner waves displaced in a vertex shader on a camera-recentered radial grid; CPU buoyancy samples the same wave field at six hull points, while GPU water rendering receives shared wave uniforms. Boats race three laps around a closed circuit with checkpoint gates, wrong-way detection, split times, AI drivers, powerslide-charged boosts, camera cycling, and gamepad controls. Rendering uses quantised cel shading, banded specular highlights, Fresnel rims, inverted-hull exterior outlines, and a Sobel pass for interior lines. Audio is synthesized with Web Audio, including engine, water, impact, and race-start sounds. The repository includes a Playwright-based screenshot harness for capturing and verifying game frames.

GitDiagram is a web application that turns public or private GitHub repositories into interactive architecture diagrams with links back to the source files and directories. It retrieves a repository's default branch, tree, README, and bounded, integrity-checked source excerpts through the GitHub API; an OpenAI or OpenRouter model produces a source-grounded overview and graph, whose groups, nodes, edges, shapes, labels, and paths are validated against the repository. A deterministic compiler converts the validated graph to Mermaid, while the browser sanitizes and renders the result and can export Mermaid source or a PNG. Successful diagrams are persisted for later reopening, and private-repository access uses a GitHub token supplied for the relevant request rather than embedding the token in public links.

OpenPencil is an open-source, local-first design editor and Figma alternative developed as a programmable toolkit. It opens and writes native .fig files and supported .pen documents, supports components, variants, auto layout, CSS Grid, real-time peer-to-peer collaboration over WebRTC, and exports designs to formats including SVG, PDF, HTML, JSX, Tailwind JSX, Storybook stories, and .fig. Its built-in AI assistant uses more than 100 tools to create and modify design nodes, manage components and variables, analyze design tokens, and export assets. Users provide their own API key for supported providers such as OpenRouter, Anthropic, OpenAI, Google AI, DeepSeek, Z.ai, and MiniMax. A headless CLI can inspect document trees, query nodes with XPath, run Figma Plugin API JavaScript, lint and analyze files, convert formats, import HTML/CSS as editable layers, and control the running editor. An MCP server exposes design inspection, modification, and export tools to coding agents and other MCP clients, while a headless Vue SDK supports custom editing surfaces. OpenPencil runs as a Tauri desktop application for macOS, Windows, and Linux, as well as a browser PWA, and is available through Homebrew, downloadable releases, and the web app. The project is in active development and is licensed under the MIT License; its optional cloud server and administration components use the Apache License 2.0.