Using VNCj, you can create a full graphical user interface (GUI) in Java, using Swing and AWT, and immediately export it to anyone on the network with a VNC viewer (without it displaying on the machine in which the VM is running).
ARD is a remote administration tool for Unix/Linux & 95/98/ME/NT/2000 systems. Based on VNC technology , you can use ARD of the VNC to interact with a remote computer as though it's right next to you. ARD is great free remote-desktop tool.