ZoneScreen Alternatives

Multiplicity enables a user to control multiple computers with one keyboard and mouse.

spacedesk expands the Windows desktop computer screen to other computers over the local area...

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Air Display allows extra screens to extend the display size of a Mac desktop. The company behind the product is Avatron Software, which was founded in 2008. Read more about Air 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.

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.

Use Splashtop Wired XDisplay to turn your iPad, Android tablet, Kindle or smartphone into a high-performance extra monitor for your computer.

External display for your iPad/iPhone!

You can create dual monitors quickly and easily using a USB.

VirtScreen is an easy-to-use Linux GUI app that creates a virtual secondary screen and shares it through VNC.

AirPlay Mirror your computer screen and sound to your Apple TV or ChromeCast just like you AirPlay your iPhone/iPad display

Barrier is a cross-platform software for sharing your mouse and keyboard between multiple computers...

Cross-platform software for sharing your mouse and keyboard between multiple computers

Open Source

With its easy setup and high level of versatility, ShareMouse is a great tool if you're looking to use a single mouse and keyboard across multiple computers.