iTunes link: TeamViewer - Free
TeamViewer allows you to securely access and control your desktop computer from your iPhone over both a local Wi-Fi connection and from across the Internet. All you need to do is install a small application on your desktop computer and then load up TeamViewer on your phone.
You’ll then be able to see your computer’s desktop on your handset and control its mouse remotely via the iPhone’s touchscreen. Using multitouch gestures it even allows you to carry out tasks on the remote PC such as drag and drop and zoom. You can also change the remote PC’s screen resolution and even perform a reboot. The software is free for non-commercial use, but business users need to pay £59.99 for the corporate licence.
TeamViewer makes it easy to access and control your desktop computer remotely from your iPhone.