USB to serial 4 Port DB-9 RS-232 Adapter with FTDI Chip
FTDI - USB
2 Port FTDI USB to Serial RS232 Adapter Cable with COM Retention
FTDI USB HUB, 4600 (POS #1-3) - Entech Instruments
FTDI USB to 4 Ports TTL 5V 3.3V Serial Port Adapter, USB HUB 5-Ports USB Splitter, USB Expansion Multiple Serial Port
FTDI USB to 4 Ports TTL 5V 3.3V Serial Port Adapter, USB HUB 5-Ports USB Splitter, USB Expansion Multiple Serial Port - AliExpress
FTDI USB to 4 Ports TTL 5V 3.3V Serial Port Adapter, USB HUB 5-Ports USB Splitter, USB Expansion Multiple Serial Port
SerialGear USB 4-Port Serial Adapter / USB 2.0 Quad Port Serial DB-9 RS-232
StarTech.com USB to Serial Hub - 8 Port - COM Port Retention - Rack Mount and Daisy Chainable - FTDI USB to RS232 Hub (ICUSB23208FD) - serial adapter - USB 2.0 - RS-232 x 8 - ICUSB23208FD
Adafruit FTDI Friend + Extras [ADA284]
1 Port USB to Serial RS-232 Hub w/ FTDI Chipset & LED Indicators - Rugged Metal Housing Ideal for Mounting
StarTech.com USB to Serial Hub - 16 Port - COM Port Retention - Rack Mount and Daisy Chainable - FTDI USB to RS232 Hub (ICUSB23216FD)