GiMeSpace Desktop Extender - Software for extending windows desktops and other utilities for making windows easier.
Dexpot - If you don't have Dexpot yet, the new update makes it a must-have tool for Windows, adding a ton of features to your desktop that you never knew you wanted.
SDesk - SDesk (Scrollable Desktop) is not a multidesktop application.
VirtuaWin - VirtuaWin is a virtual desktop manager for the Windows operating system (Win9x/ME/NT/Win2K/XP/Win2003/Vista/Win7/Win10). A virtual desktop manager lets you organize applications over several virtual desktops (also called 'workspaces').
Virtual Dimension - Virtual Dimension is a free, fast, and feature-full virtual desktop manager for Windows platform.
Sysinternals Desktops - Desktops allows you to organize your applications on up to four virtual desktops.