Figma - Team-based interface design, Figma lets you collaborate on designs in real time.

UX Flow Wireframe Prototyping System - Create beautiful user flows prototypes for your next project

GEES - GEES is an all-in-one AI design platform that is shaping a future where you can brainstorm, design, hand-off in one file — without changing any other tools.

draw.io - Online diagramming application

Sketch - Professional digital design for Mac.

UMLGraph - UMLGraph is a professional automated drawing tool that allows the designers the declarative specification and drawing of UML class and sequence diagram.