Works great - very useful
Duet Display - With Duet Display, you can transform your iPhone or iPad into a second display to expand the screen space of your PC or Mac system.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
iDisplay - iDisplay is an app that turns a mobile device into a secondary desktop monitor. The app currently supports iOS, Android, Windows and MacOS, and it lets users connect a desktop computer to a mobile device over WiFi. Read more about iDisplay.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
Luna Display - Hardware that turns the iPad into a wireless second display
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode