tldraw

Quickdraw is an MIT-licensed, open-source infinite-canvas whiteboard SDK for React, React Native/Expo, and plain JavaScript applications. It provides freehand pressure ink, highlighters, shapes, arrows, lines, text, sticky notes, images, selection and transformation tools, laser presentation pointers, themes, grids, palm rejection, and PNG export. Its data model emits JSON-safe diffs for real-time synchronization over an application-chosen transport, with support for persistence, undo/redo, and stroke-by-stroke replay. The project provides separate core, React, and React Native packages; the core is plain ESM with zero runtime dependencies and can run in modern browsers without a build step. The repository states that it is free for commercial use and has no license fee.

Excalidraw is an open-source virtual whiteboard for creating hand-drawn-style diagrams, wireframes, and other canvas-based drawings. It provides tools for shapes, arrows, lines, freehand drawing, image insertion, labeled and bound arrows, zooming, panning, undo and redo, dark mode, shape libraries, localization, and export to PNG, SVG, clipboard, or its open JSON format. The editor is available as an npm package for integration into applications. The hosted Excalidraw.com app adds real-time collaboration, end-to-end encryption, browser autosave with local-first behavior, offline PWA support, and shareable read-only links. The videos describe using Excalidraw to visualize Mermaid-generated diagrams and to manually map multi-step AI workflows with jobs, arrows, parallel lanes, checks, and human approvals.

reladraw is a text language and command-line tool for creating diagrams with relative positioning. It sits between automatic layout systems such as Mermaid, Graphviz, and D2 and manually positioned editors such as draw.io: users declare nodes, relationships, labels, and relative placement without specifying absolute coordinates. The parser and layout engine resolve the declarations into a diagram, while the tool reports issues such as overlaps, crossed edges, and text overflow without requiring a rendered preview. Its TypeScript CLI converts `.reladraw` files to SVG, and the repository also provides a browser version and an optional agent skill. The project is early-stage, its syntax is subject to change, and the code is licensed under Apache-2.0.

Drawesome is a drawing toolbar and canvas component for React applications. It provides seven pen types—pencil, pen, brush, fineliner, highlighter, fountain pen, and another configurable pen tool—that vary stroke width according to movement speed or direction, plus an eraser that removes areas of strokes rather than deleting whole strokes. The React component supports configurable tools, colors, sizes, opacity, toolbar placement, appearance, controls, themes, tooltips, keyboard shortcuts, and initial or externally managed strokes. Drawings can be exported as SVG or PNG, downloaded directly, or accessed as stroke data through its ref methods. It is installed with npm, requires React 18 or later as a peer dependency, and has no runtime dependency beyond React.

Whiteboard is an open-source desktop app for humans and coding agents to architect software in a shared workspace. It connects to agents such as Claude Code and Codex, giving them an SDK for drawing diagrams and describing their work on an in-app canvas. Visualizations including sequence diagrams, entity-relationship diagrams, and agent-trace quotations can link directly to underlying code, while the code-review interface provides VS Code keybindings and LSP support. Whiteboard includes a semantic, AST-aware diff viewer written in Rust. It summarizes large added functions as pseudocode and can collapse or hide changes such as tests and documentation; a WebAssembly-based plugin system makes these rules customizable. Its decision-log tools let agents query and link their traces so users can inspect requirements, implementation choices, and autonomous decisions. The app runs against local checkouts, is distributed for macOS, Windows, Ubuntu, and Fedora, and is licensed under the MIT License. It is self-hostable, although hosted team functionality is planned. Current limitations include no file editing within Whiteboard and limited support for reviewing multiple repositories together.