FocusMask v1.1 Mac OS X | 2.1 MB
FocusMask is a simple concentration aid that allows you to hide clutter on your screen (without affecting the hidden windows). Simply point your cursor at a window on your desktop, press a keyboard shortcut, and all the other objects competing for your attention will fade away into the background. You can also isolate only a part of a window through pattern detection, or manually highlight any part of the screen by clicking and dragging your own selection. Please see the screenshots below for a visual explanation.
Features:
- Improve your focus by fading away distractions.
 - Visually highlight a single window on your desktop, a part of a window, or make your own selection.
 - Customizable keyboard shortcuts
 - Fully adjustable opacity
 - Works with Spaces
 - Supports multiple monitors
 - Animated tutorial shows you how to use the application
 - Uses little memory
 - Helps you take better screenshots
 - Hides everything, even the dock and menubar
 
- OS X 10.9 support. Added retina icon.