Remote HD

 the ultimate way to remotely access your Mac, PC and Apple TV
Click to open Remote HD in the iTunes App Store
Mac Apple TV PC

Feature Comparison

Feature Lite Version Full Version
Apple Remote like controls Yes Yes
Volume Slider Yes Yes
Hardware buttons for volume control Yes Yes
Application based layouts Yes Yes
Integrated button labelling Yes Yes
Griffin Proxi integration Yes Yes
Automatically configure 3G, EDGE, GPRS on UPnP routers Yes Yes
Application Switcher Yes Yes
Dock (Table View) Yes Yes
Application Launcher Available after Upgrade Yes
Remote Spotlight Available after Upgrade Yes
Connection Management Available after Upgrade Yes
Automatic Wake-On-Lan Available after Upgrade Yes

Upgrade

Lite version supports in application upgrade. It can be upgraded to the full version anytime by paying the difference.
You don't even have to restart Remote HD.