CNCjs is described as 'A web-based interface for CNC milling controller running Grbl, Smoothieware, or TinyG. It runs on an Raspberry Pi or a laptop computer that you have Node.js installed, connecting to the Arduino over a serial connection using a USB serial port, a Bluetooth serial module, or a' and is an app in the system & hardware category. There are more than 10 alternatives to CNCjs for a variety of platforms, including Windows, Linux, Mac, Raspberry Pi and Web-based apps. The best CNCjs alternative is Universal Gcode Sender, which is both free and Open Source. Other great apps like CNCjs are Rayforge, gSender, bCNC and OpenBuilds CONTROL.