AquaSnap - Too many windows on your screen? Stop wasting your productivity.
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').
WindowGrid - Quickly and easily layout windows on a dynamic grid using just the mouse.
Sysinternals Desktops - Desktops allows you to organize your applications on up to four virtual desktops.
Sizer - Sizer is a freeware utility that allows you to resize any window to an exact, predefined size.
9Desks - up to nine virtual desktops