Is your Mac keeping you up late? F.lux is a free download that warms up your computer display at night, to match your indoor lighting. The app saves your eyes by making your display’s brightness adapt to the time of day.
Grayscale Mode is a menu bar app that gives you more control over Grayscale Mode.
HiddenMe hides all the clutter on your mac desktop with a single click.
Hummingbird is a menu bar app that allows easy moving and resizing of windows by holding modifier keys and dragging your mouse to move and resize windows.