Serial Port Splitter - Share dataflow of one serial port among several applications or join dataflow of several serial port devices to one application.
4XEM 4-Port VGA Splitter 250 MHz
Share COM port between apps. Serial Data Splitter. [TUTORIAL]
RJ45 Splitter | Current Connected
Serial Port Splitter - Case Studies - Using Serial Port Splitter to Share COM-port for Several Programs
SVR-4 - 4-Port VGA Splitter - Xenarc Technologies
Amazon.com: StarTech.com 2 Port VGA Video Splitter - USB Powered - 2048x1536 - VGA Video Monitor Splitter Dual Port (ST122LE) Black : Electronics
List of The Best Serial Port Splitters: Software and Hardware Tools
StarTech.com 4K HDMI 2-Port Video Splitter - USB or Power Adapter - 4K 30Hz - ST122HD4KU - Audio & Video Cables - CDW.com