KVMs are unreasonably expensive and my work was about to throw this one in the dumpster. I just need to order some console cables first but I’m really pleased.
If you’re comfortable with it, an analog (non-networked) kvm switch can have its button connected to a single input Pikvm via the GPIO. You visit the PiKVM’s webpage, hit a button and you’re now connected to a different machine.
If you have a raspberry pi 1 or 2, this isn’t very expensive, but nets you an open source IP KVM.