USB Host part2
Arduino
https://app.box.com/s/i1lijnil6bmsxpph60ik2sp19b91tvav;
http://forum.arduino.cc/index.php?topic=96663.0
LUFA
http://fourwalledcubicle.com/LUFA.php
http://www.fourwalledcubicle.com/files/LUFA/Doc/120219/html/index.html
http://www.fourwalledcubicle.com/files/LUFA/Doc/120219/html/_page__alternative_stacks.html
Lufa example
http://smartinteractionlab.com/lufa-example-turning-your-arduino-into-a-keyboard/
V-USB is a software-only implementation of a low-speed USB device for Atmelfs AVR® microcontrollers, making it possible to build USB hardware with almost any AVR® microcontroller, not requiring any additional chip.
https://www.obdev.at/products/vusb/index.html
KVMC with arduino
http://gmurdocca.livejournal.com/4211.html
https://www.pjrc.com/teensy/
Other teensy Projects USB client Usb Host2
http://www.pjrc.com/teensy/projects.html
Raspberry Pi Zero
OTG USB Host, client
Pi Zerro No need for HDMI, keyboard, mouse.
http://pi.gbaman.info/?p=699
http://blog.gbaman.info/?p=791