THE DIRECTORY
The tool directory.
Find, save, and compare tools for visualizing human, robotic, and software systems.
57 matching tools to explore
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Official offerings and documented capabilities. AI and license details are assessed separately. Review notes qualify listings with limited release evidence.
Eraser
An engineering workspace for turning system descriptions and codebase context into editable technical diagrams.
BEST FOR
Engineering design docs and system architecture.
Mermaid Chart
Use natural language to generate and refine Mermaid syntax, keeping your diagrams readable as text.
BEST FOR
Versionable sequence diagrams and text-based documentation.
Miro
A collaborative canvas with AI generation for technical diagrams, from system designs to database relationships.
BEST FOR
Team workshops that connect discovery with technical design.
Whimsical
Create flows from a prompt or bring diagramming into your AI assistant through its documented integrations.
BEST FOR
User flows, early design conversations and quick sequence sketches.
draw.io
Also listed as: Diagramly
Generate editable diagrams with AI and refine them in a familiar shape-and-connector editor.
BEST FOR
Teams that want direct control over generated diagram elements.
Apache-2.0 (code)
The editor code is Apache-2.0; bundled icons, stencils and templates have separate terms. Hosted AI services may have separate requirements.
Review notes · 2026-10-17
Historical Diagramly lineage belongs to draw.io / diagrams.net, already in the new directory. Do not confuse it with unrelated modern Diagramly-branded tools.
Lucidchart
Also listed as: Lucidchart
Generate diagrams from text and refine them with AI within a mature visual diagramming workspace.
BEST FOR
Teams combining formal diagramming and collaborative review.
Review notes · 2026-10-17
Current product was already verified and included in the new directory.
Mermaid
An open-source JavaScript library that renders readable text definitions as diagrams in documentation and developer tools.
BEST FOR
Keeping technical diagrams beside code in version control.
MIT
Excalidraw
An open-source canvas for sketch-style diagrams, whiteboards and wireframes, with editable drawings and image export.
BEST FOR
Collaborative system sketches and informal architecture conversations.
MIT
PlantUML
Also listed as: PlantUML
Generate UML and other technical diagrams from textual descriptions that can live alongside your project documentation.
BEST FOR
Detailed sequence and UML diagrams in repeatable documentation pipelines.
Multiple license variants; see repository
Review notes · 2026-10-17
Current project and official repository verified during the open-source directory update.
Eclipse Acceleo
Also listed as: Acceleo
Generate text and code from EMF-based models using Eclipse model-to-text tooling.
BEST FOR
Model-driven code generation.
Review notes · 2026-10-17
Official Eclipse update sites include the 4.x line. A model-to-text generator, rather than a diagram editor.
Amateras Modeler
Also listed as: AmaterasUML
An Eclipse-based editor for UML and entity-relationship diagrams, formerly AmaterasUML and AmaterasERD.
BEST FOR
UML and ER modeling within Eclipse.
Review notes · 2026-10-17
Maintainer repository explicitly identifies the project as formerly AmaterasUML and AmaterasERD.
Eclipse ATL
Also listed as: ATL
Transform source models into target models using the ATL language and Eclipse development tooling.
BEST FOR
Model-to-model transformation workflows.
Review notes · 2026-10-17
Official downloads and model-transformation documentation remain available; old M2M URL is obsolete.
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