Vingre
Vingre is a vnc connection manager. It connects to desktops across a network.
Tests to try
If you have 2 machines. Enable desktop sharing on one. Do this by going to System -> Preferences -> Remote Desktop and enable Allow other users to view my desktop.
On the second machine go to Applications -> Internet -> Remote Desktop Viewer, hit connect, type in the ip address of the 1st machine.
- Check that the mouse works and that the keyboard works and everything functions as though you were using the remote machine.