May 23, 2013, 8:30 PM — Here's how you can get a free app for Windows called Le Dimmer. Le Dimmer lets you dim all windows except the active one, making it easier to concentrate on what you are doing.
1. Go to the Le Dimmer download page.
2. Click the Download Now button.
Here's a description of Le Dimmer:
"Le Dimmer automatically dims everything on your desktop apart from the active window. It can also prove to be very useful if you have multiple windows opened and you want to focus only on one window at a time."
For more, see the original article at the link below.