Swapp

Swapp... Don't move your windows from one display to the other. Swap them all!
Move all windows from the main display to the secondary one, and the other way around, at once.

Also, you can swap front most application windows or just front most window.
Features highlights:
- Keyboard shortcuts and systemwide menu extra icon.
- Choose click-to-swap mouse button in preferences. Default are left-click to show the menu and right-click to swap.
- Manage a blacklist of applications that you don't want to swap.
Contact us at swapp@wuonm.com or @swapapp in Twitter.