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.
Synergy - Cross-platform software for sharing your mouse and keyboard between multiple computers
Astropad - Astropad is a free form drawing tool designed from the ground up to take advantages of the features offered by an iPad.
Input Director - Control multiple windows systems with one keyboard/mouse. Share a keyboard and mouse across multiple windows system.
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.
Barrier - Barrier is a cross-platform software for sharing your mouse and keyboard between multiple computers...