VNC 

The VNC 4.1 is the free edition version (last version is 4.1.3). VNC (Virtual Network Computing) allows you to remotely control another computer using the RFB protocol (remote frame buffer). The setup file installs two components: VNC Viewer and VNC Server. The VNC Viewer is the program used to work like client, and VNC Server allows a Windows desktop to be accessed remotely using the VNC Viewer. The VNC service must be running in order to use the server and the client. You can add as many clients as you wish to connect typing the IP address. To use the VNC Viewer you have to specify the IP address or the name of the server you want connect. In the VNC Server Options there are many tabs to configure your connection. In the Authentication tab you can configure a password and prompt local users to accept connections. In the Connections tab you can configure the ports and allow, deny or query access control. In the Inputs tab you can accept events from clients. There are some other tabs that you can configure: Desktop, Sharing, Legacy, and Capture Method. The System requirements are: Microsoft Windows 9x, ME, NT4, 2000, XP, 2003 Server.