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Virtual whiteboard for sketching hand-drawn like diagrams

Draw and edit draw.io diagrams by chatting with an AI. Web app, desktop app, and an MCP server for Claude Code, Cursor, Codex and VS Code.

Renders Mermaid diagrams faster than you'd run from a volcano! 🌋

Agent skill that generates rich HTML pages or slide decks for diagrams, diff reviews, plan audits, data tables, and project recaps

AI-native knowledge base & Evernote/Obsidian alternative. Instant all-platform sync, rich notes (tables, mind maps, diagrams, posters), web clipper & MCP. 100% free on Cloudflare or Docker.

Generation of diagrams like flowcharts or sequence diagrams from text in a similar manner as markdown

Visualize any GitHub codebase: free interactive architecture diagrams and one-minute explainer videos. Replace 'hub' with 'diagram' in any GitHub URL.

Database diagrams editor that allows you to visualize and design your DB with a single query.

Konva.js is an HTML5 Canvas JavaScript framework for interactive graphics, design editors, whiteboards, and diagrams. Scene graph with events, drag and drop, transforms, animations, and export.

:art: Diagram as Code for prototyping cloud system architectures

Generate diagrams from textual description

Interactive, source-linked ML workflow diagrams written by your coding assistant (Copilot, Codex or Claude Code) and opened in VS Code.

Generate Entity-Relationship Diagrams for Rails applications

CALPHAD tools for designing thermodynamic models, calculating phase diagrams and investigating phase equilibria.

The Pencil Project's unique mission is to build a free and opensource tool for making diagrams and GUI prototyping that everyone can use.

A library for creating and editing graph-like diagrams in JavaFX.

Mermaid diagrams in yours sphinx powered docs

Create beautiful diagrams just by typing notation in plain text.

View flow data as Sankey diagrams

CLI app to convert ASCII arts into hand drawn diagrams.

A library to produce syntax diagrams as Scalable Vector Graphics

Creates diagrams from textual descriptions!

JavaScript architecture diagrams and dependency graphs

A set of PlantUML libraries and a NPM cli tool to design diagrams which focus on several technologies/approaches: Amazon Web Services (AWS), Azure, Google Cloud Platform (GCP), C4 Model or even EventStorming and more.

Asciidoctor.js extension to convert diagrams to images using Kroki!

TextUSM is a web-based diagram editor that generates diagrams from indented text

The Python toolkit for computing with string diagrams.

View and Browse Code Using Flow Diagrams

Edit, preview and share mermaid charts/diagrams. New implementation of the live editor.

MQT DDSIM - A Quantum Circuit Simulator Based on Decision Diagrams