The Advanced Docking System for Windows. Wikipedia defines a dock as a user interface feature of a number of operating systems that typically provides a user with a way of launching and switching between applications. The Winstep Nexus Dock is a professional dock for Windows. With Nexus, your most frequently used applications are only a mouse click away – and Nexus turns working with your computer into a fun and exciting experience.Nexus Ultimate is an enhanced version of the free-to-use Nexus dock which is available stand-alone or as a component of Winstep Xtreme (a single easy-to-install package featuring all of Winstep’s popular desktop enhancement products for Windows)