Anything involving creating 2D images, mostly Adobe Photoshop and Illustrator. May add to this every so often so my Adobe skills don't get rusty.
Anything involving creating 3D images, mostly Cura for splicing and Blender for editing/creating. Most of the projects I print come from existing models from Thingiverse. I use an Ender-3 for printing, but I plan to upgrade soon.
[Currently my 3D Printer is out of commission, working on repairs. ] :(