RemotelyAnywhere is a useful tool that can be used to control computers remotely.

RemotelyAnywhere is very similar to Pro in terms of available features, but instead of connecting over the internet, the remote connection is conducted over a Local Area Network (LAN). This is particularly useful if security is your concern. With RemotelyAnywhere, you do not log into the website to connect to computers, you connect directly via IP address. It needs only to be installed on the machine to be controlled, and then you will be able to access that computer securely from anywhere using an internet-enabled PC, WAP cell phone, or PDA. It comes in two different editions, Workstation or Server, with a variety of administrative tools.