Pointing without moving
The Ploopy trackball is an open-source project. Electronics aside, it’s an easy to maintain device for which one can 3D print parts like the outer shell and the buttons. Its firmware is QMK based, which allow easy and powerfull customization and a consistent experience cross-devices and operating systems without the need of a driver. After some binding changes, it’s a really good trackball for chordings on 9front.