AltDrag allows you to drag windows with the mouse when pressing the alt key. You can use the Middle or right mouse button to resize windows. If you press the shift key while you drag or resize, the window will stick to other windows. You can also double-click a window to maximize it. fullScreen windows, such as games, will not be dragged or resized.
This is a really handy feature that already exists in Linux. It's so nice that I decided to make a Windows program that enables you to do the same thing.