The full list of keyboard shortcuts widows 7 includes:
Win+Home: Clear all but the active window.
Win+Space: All windows become transparent so you can see through to the desktop.
Win+Up arrow: Maximize the active window.
Shift+Win+Up arrow: Maximize the active window vertically.
Win+Down arrow: Minimize the window/Restore the window if it's maximized.
Win+Left/Right arrows: Dock the window to each side of the monitor.
Shift+Win+Left/Right arrows: Move the window to the monitor on the left or right.
You can also interact with windows by dragging them with the mouse:
Drag window to the top: Maximize
Drag window left/right: Dock the window to fill half of the screen.
Shake window back/forth: Minimize everything but the current window.
Double-Click Top Window Border (edge): Maximize window vertically.