Screens 4 4.0

Screens 4 is a powerful VNC client app that lets you control any computer
from anywhere as if you were sitting in front of it.

For Macs with several attached displays, Screens lets you select an individual one or you can show them all at once. Plus, it can remember your last selection for future sessions. You can organize your saved screens as groups to keep everything in order. The Curtain Mode obscures the display on remote Macs you connect to. It is very useful if you don't want anyone to see what you're doing.