Android: If you're looking for a no-fuss way to turn your Android's touchscreen into a touchpad for your computer, open-source RemoteDroid has cross-platform support for easy wireless mousing and typing on Windows, Mac and Linux machines.
RemoteDroid comes in two parts, first you install the RemoteDroid client application on your Android phone and then you install the Java-based server application on the computer you wish to control. RemoteDroid uses your home's wireless network for communication between your phone and the remote computer. Watch the video above to see the setup and usage in action.
RemoteDroid is open-source and works wherever Android does. Download it by searching for "RemoteDroid" on Android Marketplace from your phone or by scanning the QR code to the right. Have a favourite application for squeezing even more awesomeness out of your Android phone? Let's hear about it in the comments.