system design diagrams

What is the challenge?

I want to have a high level Web System design

What is the impact?

A interactive way to be able to design a complete system, and its interactions between their different modules, components, and particularly, the sub models, services architecture if you will

Describe your idea

I want a way to be able to do System Model Design, define higher level modules, inputs, outputs, and its interactions with other modules, also a way to define and depict the interaction of sub-models (micro-services).