ckb-next is described as 'open-source driver for Corsair keyboards and mice. It aims to bring the features of Corsair's proprietary CUE software to the Linux and Mac operating systems. This project is currently a work in progress' and is an app. There are three alternatives to ckb-next for Windows, Mac, Android and Linux. The best alternative is OpenRGB, which is both free and Open Source. Other great apps like ckb-next are ROCCAT Swarm and iCUE.