PL2303TA USB to TTL RS232 4 Pin Serial Converter Cable for Win 7/8/8.1 Universal | eBay
FTDI TTL-232R-RPI Debug Cable for Raspberry Pi Module,3Way,3.3V, TTL-232R-RPI 3V3 USB to TTL UART Converter Adapter Serial Cable - Newegg.com
USB to TTL 4-pin Wire - PiShop.us
Amazon.com: ADAFRUIT Industries 954 USB-to-TTL Serial Cable, Raspberry PI (1 Piece) : Electronics
FTDI Serial TTL-232 USB Type C Cable [5V Power / 3.3V Logic] : ID 4364 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits
USB TO UART TTL (Wires) Serial Cable (PL2303HX)
Amazon.com: USB to TTL Serial 3.3V UART Converter Cable with FTDI Chip Terminated by 6 Way Header, Works with Galileo Gen2 Boards/BeagleBone Black/Minnowboard Max and More : Electronics
FTDI TTL-232RG-VSW3V3 USB to TC2030-NL Test Cable | Tag-Connect