Input Director

I tried all the others first, and had problems with each:

• Synergy is no longer free. Even the nightly builds are crippleware.
• Mouse Without Borders swaps all keyboard and mouse like devices from all machines to the active one, which prevents use of an HTPC remote on my HTPC when slaved to a laptop.
• ShareMouse considers preventing the mouse from switching screens unless Ctrl is pressed to be a premium feature, and nags the crap out of you about it.
• MWB and ShareMouse both have issues with controlling games.

ID has none of the above issues, and is completely free.

The latest version of Input Director is v2.0 and was released on the 22nd August 2020. This version continues to be free for personal use. However, this version is not compatible with Windows systems that are connected to an Active Directory (AD) domain.
Which means that:

• if you intend to use it on a personal computer and a work computer configuration, where your work computer is connected to an AD domain, you will need to purchase a commercial license.
• If you try to install it on a computer connected to an AD domain, it will not install. Instead, you will get a warning indicating that the AD domain was detected and direct you to contact the author to purchase a commercial license.

New features include:

• Input Director's user interface has been refreshed, modernized, and improved
• Adding a new system is easier with a new 'Scan Network' feature to find other systems on the network running Input Director
• There are no longer separate Master and Slave modes. Whether a computer is controllable and/or can control another comes down to how Input Director is configured
• The merging of these two modes offers an opportunity to retire the terms Master and Slave. In v2.0, systems controlling other systems are referred to as Directors and the systems being controlled are Clients
• Can control the frequency that input data is sent over the network between systems (useful for those with hi-resolution mice or less than perfect Wi-Fi connections)
• Networking connectivity improvements for folks with complex network setups
• Can exclude file copy/pastes from shared clipboard
• Improvements to the installer to minimize reboots and automatically run a hands-free upgrade if there is an existing installation of Input Director

It is a very good software, I'm using it to control 3 computer with 9 screens.

Easy to use and very reliable. Best KVM app out here

Made an immediate difference to my workflow on two computers. Amazingly easy to set up and use. Try this.

More humane than Synergy, easier to set up and use,really great one!

The application is AWESOME. Has everything you need, it's secured. Easy to use. It's a shame we can't donate, but that makes the developer even greater person.
Big thumbs up!