What are some alternatives?
When comparing GiMeSpace Desktop Extender and SDesk, you can also consider the following products
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').
Infinite_Screen - Infinite_Screen is a free tool to move or scroll your desktop.
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.
Virtual Dimension - Virtual Dimension is a free, fast, and feature-full virtual desktop manager for Windows platform.
WindowsPager - WindowsPager is a desktop-switcher/pager for Windows to manage virtual workspaces/desktops.
KWin - KWin is a window manager for the X Window System, and is in the process of becoming a Wayland...