Duplicate Windows visually copies any window in Mac OS X live and on-the-fly. It's like display mirroring for individual windows!Duplicate any window
Select any window on your Mac, and get an instant resizable copy that stays up to date with the original.
Monitor anything. Don't disrupt your workflow.
Watch videos. Watch a sports game. Monitor your servers. Keep an eye on any window you like. Just duplicate it, tell it to stay on top, resize it to just how you want it and get on with your work.
Presenter Mode for any software.
You can duplicate windows across monitors. Drive a software demo with your notes right along side on your laptop screen, while only projecting the software you're demoing. You can even duplicate as many windows as you want.
Updated for Yosemite
Improved control layout when using window managers
Remove deprecated API calls
Duplicate Windows (com.fabiancanas.duplicatewindows) is a Mac software application that has been discovered and submitted by users of Software.com.
The latest version that our users have reported running on their systems is Duplicate Windows 3.