I actually clicked on this thread for the purpose of commenting that you could do cool things with some combination of this, using spare screen/tablet devices, and Barrier. But you beat me to mentioning the concept.
Thanks! I mentioned Synergy as I've used it many years ago and was not aware of license change implications (that's why I linked to the open-source repo).
Good to know there's a good fork.
Synergy never ceases to amaze me in that these few bugs that have been around for years make it a completely broken product for me. Regret paying them.
I had a similar experience after purchasing a license. Admittedly a few years back now, but I seemed to encounter issues that would strike at the most inopportune time. I eventually moved to an RDP based setup and haven't looked back.
For Windows only there exists Mouse without border [0] which works a lot better than synergy, including sharing of the clipboard. Of course not usable if you have different systems, but for Windows there is no better solution I'm aware of.