Pen and paper, both for writing and for sketching. I also use some watercolors tubes and a couple brushes.
That said, I’m just an amateur so I may not qualify as an artist ;)
I mostly live in krita, but lately I switched to proprietary binaries (pencils, pens and markers) which are compiled (produced) in a cloud (in China). File format (paper) is proprietary too, it’s custom structure (wood) heavily obfuscated (cold-pressed) and paid only (I buy it in a store nearby)
Pokemon Art Academy and Colors!3D on my 3DS.
Otherwise for windows an older version of MSPaint, Clip Studio, and Procreate.
Pen & paper, ink on paper and oil on paper.
I do some aquarelle sometimes too, classic or with colored inks.
Procreate when I’m making something I want to print/share.
Conte on newsprint when I have access to an easel. Sometimes straight charcoal and eraser, so satisfying, but messy.
Charcoal pencil on paper when I’m at my desk practicing figure, gesture, form and value.
I use GIMP for photo editing, Inkscape for Vector drawing, and pureref for image references.
krita and aseprite. i havent done pixel art in a while though
The Affinity Suite and Pixelmator Pro on MacOS.
Been pretty lazy all-round about properly learning Photoshop, bounced off of GIMP once before, but no looking back with 3.0 out! It’s GIMP all the way for me now.