The correct answer to this question is the Mikrotik download page. Winbox is a utility, which is small. It allows for an administration of MikroTik RouterOS. This router was created in 1996. It has routers, as well as wireless ISP systems. It provides a router with features like firewall, routing, and VPN servers.
Winbox is best used on Windows, but the utility will support Mac operating systems and Linux. You must have the MikroTik Router to use Winbox. Winbox uses the protocol 8291/tcp. Online there are manuals, as well as how to videos on YouTube which provide instructions on using Winbox.