Afaik the ‘Ultimate Hacking Keyboard’ does that via its modules: http://xahlee.info/kbd/iergo/UHK_addon_modules_trackball_33001-2.jpg http://xahlee.info/kbd/ier

Afaik the ‘Ultimate Hacking Keyboard’ does that via its modules: http://xahlee.info/kbd/iergo/UHK_addon_modules_trackball_33001-2.jpg http://xahlee.info/kbd/iergo/UHK_addon_modules_trackball_330... Turns out it even has a touchpad, though its size is pitiful. Alas the whole keyboard reeks more of ‘mechanical + wacky layout‘ approach, with dubious ergonomics aside from the split halves. Otherwise, trackballs on keyboards don't seem too rare: image search turns up this Adesso board (https://www.hippo-deals.com/products-images/1500/65915.jpg https://www.hippo-deals.com/products-images/1500/65915.jpg or better-ish https://www.adesso.com/wp-content/uploads/2018/03/20170616012200.jpg https://www.adesso.com/wp-content/uploads/2018/03/2017061601...), something named KeyTronic, etc.