What programs do you use to generate visual call graphs?

Hello,

I’m about to embark on a large documentation effort. One of the goals is to come up with some diagrams. I need to create diagrams for a few state machines and an overall call graph.

What software do you all use for those tasks?

I am perfectly okay with paying for some proprietary software if it’s better and saves me time.

Previously, I would use Visio, but that’s a bit of a hassle for this type of work.

It would be nice if there was something that allowed me to just type in the function names and drag and drop some arrows or whatever.

Thanks!