Swimlanes.io – generated editable sequence diagrams
Prior art:1. Plant UML: http://www.plantuml.com/plantuml/umla/SoWkIImgAStDuNBCoKnELT...PlantUML supports many diagram types, and there's a nice VS Code plugin with side by side live preview.2. https://www.websequencediagrams.com/Has a hand-drawn style option which is nice:https://i.imgur.com/lh4jaVL.png