Remote HD

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

Feature Comparison

Feature Lite Version Full Version
Visual Trackpad Available after Upgrade Yes
Click, right click and center click Available after Upgrade Yes
Two finger gestures Available after Upgrade Yes
Keyboard Available after Upgrade Yes
Application Switcher Available after Upgrade Yes
Airmouse 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.