Official electron build of draw.io

Free, simple, and intuitive online database diagram editor and SQL generator.

A library to display an interactive editor for any graph-like data.

A toolbox for displaying and modifying diagrams on the web.

An ASCII graph drawing app

A modeling solution for BPMN, DMN, and Forms based on bpmn.io. As a companion tool to your favorite IDE it supports you in implementing solutions with Camunda.

Dgrm.net - flowchart editor. Works on desktop, phone and tablet. Has no dependency. Pure JavaScript.

Angular-native node editor library for production workflow builders, AI pipelines, and interactive diagram editors. MIT licensed.

Gaphas is the diagramming widget library for Python.

Online network diagram editor

Visualize JSON data format as a tree or graph

Pretty Fish is a browser-based Mermaid diagram editor with live preview, multi-page projects, and offline support.

Coya

Open-source collection of ready-to-use UI components for building node-based user interfaces with React Flow.

Tokyo Notes is a beautiful markdown note-taking desktop application.

Arkdraw is an open-source diagramming app for creating flowcharts, UML, ER diagrams, network maps, wireframes, and mind maps with a built-in AI assistant that generates and edits diagrams from natural-language prompts.

Web-based client framework of the graphical language server platform

Java-based server framework of the graphical language server platform

The animated diagram editor AI agents can draw on. Animated technical diagrams (architecture, sequence, BPMN, cloud icons) built by you and your agent together on the same live canvas, via WebMCP. Open-source, local-first.

Visual drag-and-drop WYSIWYG editor for Mermaid flowcharts inside Obsidian — build and rearrange diagrams by moving nodes and drawing connections, no Mermaid syntax required. Edits round-trip safely back to clean Mermaid code.