StarTech.com 2-Port Multi Monitor Adapter - USB-C to HDMI Video Splitter - USB Type-C to HDMI MST Hub - Thunderbolt 3 Compatible - Windows - USB Type-C dual-monitor adapter can drive 2x
StarTech.com 3-Port Multi Monitor Adapter - Mini DisplayPort to HDMI MST Hub - Triple 1080p/Dual 4K 30Hz - Video Splitter for Extended Desktop Mode on Windows Only - mDP 1.2 to 3x HDMI (MSTMDP123HD)
StarTech.com MSTMDP123DP Mini DisplayPort to DisplayPort Multi Monitor Splitter - 3-Port MST Hub - mDP 1.2 to 3x DP MST Hub - Newegg.com
Monoprice 4-Port DisplayPort 1.2 to DisplayPort Multi-Stream Transport (MST) Hub - Monoprice.com