My Charybdis Mini ZMK build using nice!nano's and a PMW 3610 trackball sensor. Features auto-mouse activation with an idle time requirement prior to activation to prevent accidental mouse clicks if the trackball is touched while typing. Includes a highly specific FUN layer which contains hotkeys for two forms of MacOS screenshots and controls for the window sizing and panelling app Rectangle.
Niceview branch includes code for a nice!view eink display on each half of the keyboard. The left hand shows battery level and a slideshow of art and the right hand displays Luna the dog, a WPM chart, and connectivity/battery stats.