🥦I have been using Draw.io to brainstorm/sketch directly in UML class and sequence diagrams. That's another great Open-Source utility for creativity. Note: Draw.io is open-source but closed to ...

draw.io is a configurable diagramming and whiteboarding application, jointly owned and developed by draw.io Ltd (previously named JGraph) and draw.io AG. We also run a production deployment at https:/ ...