RDP Remote Desktop for Windows is the simplest way to operate Windows PC from Mac. When I say simplest I mean no installation on your server, no configuration, and no registration, all you need to do is to input the IP address of your server. The interface is very crisp and clear, and there is no more other redundant buttons and distracting information. Once you are connected to your server, you can take full control of it without latency, as if you were sitting in front it. Assist a family member with their Internet troubles, process a file stored in your home PC when your are away, or control the computer in your lab when you are at home, all on your Mac.
Mac OS X 10.7,
Mac OS X 10.8