With HP’s new server, you can open applications or files on your home PC from any other computer in the world—without any complicated network know-how. Just type in a personal Web address, and up pops an easy-to-understand interface, based on Microsoft’s new Windows Home Server operating system, that gives you access to anything on the machine. The server can also host a photo Web site, or automatically back up all the computers in the house. $600; hp.com