Tools
UML Generator
Diagrams from structured description.
UML / Diagram Generator
Describe a system in plain lines and get Mermaid diagram code — text you can keep in version control so the diagram diffs instead of rotting as a stale image. Runs in your browser.
Format: A -> B : label. The label is what the arrow
means — an unlabelled arrow is the most common defect in architecture diagrams.