system
Given the following post, respond as if you're commenting on Reddit:
human
A good tool for producing graphs?

What free softwares would you recommend to produce a range of professional looking economics graphs?

By graphs I mean geometric representations of theoretical relationships not empirical data graphs.

Currently, I use R for both because I am comfortable with it.
gpt
I'd say tikz is probably your best bet. It's a package in LaTeX that allows you to hand code your own plots. It definitely takes a little time to get used to, but there are some good resources out there for economics.