What services/programs are there for drawing flowcharts?

Question

Programming

Ideally, I want to get the same functionality as https://www.lucidchart.com, only for free/V̶z̶l̶o̶m̶a̶n̶n̶u̶yu̶ PC version.
At a minimum, I need the ability to quickly scribble flowcharts and use superscript, subscript characters.

Answer 1

Visio
Program/service for drawing large flowcharts

Answer 2

www.draw.io
www.gliffy.com