ATEN CS782DP 2-Port UHD 4K USB DisplayPort KVM Switch - allows to access two 4K-enabled computers from a single USB keyboard, USB mouse, and DisplayPort video console - Newegg.com
KVM Switch HDMI USB
ATEN Corp 16 Port HDMI KVM Switch MPN CS17916 for sale online | eBay
Aten CS1798 8-Port USB HDMI/Audio KVM Switch | Touchboards