Windows 7 shortcut

• Win+Home: Clear all but the active window.P
• Win+Space: All windows become transparent so you can see through to the desktop.P
• Win+Up arrow: Maximize the active window.P
• Shift+Win+Up arrow: Maximize the active window vertically.P
• Win+Down arrow: Minimize the window/Restore the window if it's maximized.P
• Win+Left/Right arrows: Dock the window to each side of the monitor.P
• Shift+Win+Left/Right arrows: Move the window to the monitor on the left or right.

Source:

http://lifehacker.com/5390086/the-master-list-of-new-windows-7-shortcuts

Shortcuts

Ubuntu

• Ctr+Alt+Del Brings up the logout dialog window.

Unity

• Alt+Space Brings up window menu with with 'Always on Top' and 'Minimise' and 'Maximise' and above commands.

shortcuts as i stumbled upon

mac, firefox:
  1. command + shift + f: full screen
mac, mail:
  1. opt + command + f: search