Plus Ergo Grip for Wacom Pro and Grip Pen Stylus
I love this little accessory for the Wacom grip pens. Streamlined ergonomic design, with a slot open for the pen trigger. I own several of these
Plus Ergo Grip for Apple Pencil
This is the exact accessory, but for a Apple Pencil. It changes the balance of the pencil, but it is not a problem for me.