FT232RL: USB to Serial 232 TTL Adapter –?and ISP? - Programming Questions - Arduino Forum
FT232RL 3.3V 5.5V FTDI USB to TTL Serial Adapter Module for Arduino Mini Port | eBay
FTDI USB to serial TTL cable 1.8m
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$14.99 - 3.3V & 5V FTDI Basic Breakout - Mini USB - Tinkersphere
FTDI-Based Serial TTL-232-3.3V USB Cable with Female and Male Wiring Harnesses. Compatible with Windows XP Through Windows 7; Mac OS 8 Through OS X, Linux and Arduino! : Electronics - Amazon.com
FTDI Serial TTL-232 USB Cable : ID 70 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits