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').
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Sysinternals Desktops - Desktops allows you to organize your applications on up to four virtual desktops.
MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint
9Desks - up to nine virtual desktops
Confluence - Confluence is content collaboration software that changes how modern teams work