Intel Remote Keyboard for Android is a neat companion app that essentially enables you to connect to Intel NUC and Compute Stick hardware and control input via your smartphone.
Should you be rocking one of the supported micro-PCs, you'll be able to connect your smartphone and control PC input via the touchscreen. Intel Remote Keyboard acts as not only a smart keyboard, but also a mouse too for all your input needs. A keyboard is displayed on-screen with enough whitespace above to perform trackpad functions.
It's available for free and works with both Windows 7 and 8, though you will need a supported product to connect to. The companion software will need to be installed on the PC you wish to connect to, and both devices will need to be on the same Wi-Fi network.