What is a simple and convenient vector editor for creating diagrams?

Question

Layouts and prototypes

we need an offline application - an editor for creating a flowchart of the future application,
approximately like in a figma - several screens with buttons ... but we need a simpler editor so that the design (colors and pictures) is
suitable for children arrows

Answer 1

https://qna.habr.com/q/487616

Answer 2

draw.io