1. Aero Peek
Aero Peek expands on Vista's Aero graphical interface. If you have many windows open, Peek brings the window you want to focus on to the front, while turning all other open windows into transparent "glass sheets." Peek also works on the desktop. If you mouse over the "Show Desktop" control at the far right of the taskbar all windows on the desktop turn to glass, allowing the entire desktop to be seen.