The best Keyboard Sharing alternative to Barrier is Input Leap, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Barrier and 15 are Keyboard Sharing Utilities so hopefully you can find a suitable replacement. Other interesting Keyboard Sharing Utility alternatives to Barrier are Synergy, Mouse without Borders, Input Director and Deskflow.
Input Leap is software that mimics the functionality of a KVM switch, which historically would allow you to use a single keyboard and mouse to control multiple computers by physically turning a dial on the box to switch the machine you're controlling at any given moment.
Synergy combines your desktop devices together in to one cohesive experience. It's software for sharing your mouse and keyboard between multiple computers on your desk. It works on Windows, macOS and Linux.
Control multiple PCs effortlessly with a single mouse and keyboard, drag-and-drop files between machines, and customize your screens with Bing images, all without extra gear.
Input Director is a Windows application that lets you control multiple Windows systems using the keyboard/mouse attached to one computer. It is designed for folks who have two (or more) computers set up at home and find themselves regularly sliding from one system to the other.
Deskflow is a free and open-source keyboard and mouse sharing app. Use the keyboard, mouse, or trackpad of one computer to control nearby computers, and work seamlessly between them. It's like a software KVM (but without the video). TLS encryption is enabled by default.
InputShare enables you to share the keyboard and mouse of your computer with an Android device via ADB in wired / wireless way.
Multiplicity offers a virtual KVM solution, managing several computers with one keyboard and mouse. Its remote modes enable cursor transition across monitors and centralized control. Users can transfer files, stream audio, and lock computers without extra hardware, suitable for command rooms, IT desks, and home users.
Seamlessly control multiple computers using one mouse and keyboard, switch between systems by moving the pointer, transmit input securely over LAN, share clipboard, support drag-and-drop files, and work across Windows or macOS with no hardware required.
Cross-platform utility tool for seamless mouse, keyboard and clipboard sharing and usage in multi-display, single and multi-device setups.
The Apple Universal Control allow you to control multiple Apple devices, such as an iMac, MacBook, and iPad, all with the same keyboard and mouse.
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Barrier is no longer developed, and Input Leap is an active project based on the same source code