Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
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.
Visio - Simplify and communicate complex information using data-linked diagrams.