they can resize windows, but they have no window resizer.
The Resize state is turned on as soon as you start resizing a window with the mouse pointer opposing arrows cursor; i.e., hover the pointer over the border of the window until it turns into opposing arrows, then left-click on the window's border and (keeping the mouse button depressed) drag the border to its new size. Another way to resize a window is to activate its system menu and select there the Size command, then use the arrow keys to resize the window - finally pressing <Enter> to keep the selected size or <Esc> to cancel the changes. When you release the left mouse button or press one of the above-mentioned keys, Resize state is turned off. Actual Tools programs can automatically execute the following actions while resizing a window:
Aero Snap - toggle the Aero Snap sizing effects.
Make Transparent - set the specified transparency level. The previous transparency level will be restored when the Resize operation is completed.
Restrict Placement - deny resizing a window so it goes beyond the defined limits.
Snap - place the dragged window's border with no gaps to desktop borders and other windows.
As a not so funny fact, my task manager has a window resizer included. But it's a $50 task manager, not a window resizer...