Getting started with the USB host shield — Gerrit Niezen
USB Host Shield for Arduino Compatible with Google Android ADK UNO MAX3421E | eBay
RFduino - USB Shield - DEV-13209 - SparkFun Electronics
Teensy with mini USB host shield (chineese) | Teensy Forum
Cytron USB Host Shield V1.5 for Arduino - RobotShop
Amazon.com: USB Host Shield Compatible for Arduino MEGA 2560 1280 Support Google Android ADK & USB HUB Function : Electronics
Arduino USB Host Shield | Arduino Documentation
USB 2.0 Cable - A-Male to B-Male for ESP8266 Web Server Serial Port WiFi Shield Expansion Board ESP-13 (Specific Models Only) - 10 FT/2 PACK/BLACK - Walmart.com
Mini USB Host Shield 2.0 ADK SLR Development Board Tool Compatible Expansion Module SPI Interface Support for Google for Arduino - AliExpress