MiniKey (Tiny USB keyboard)
[http://www.cartft.com/catalog/il/478]
  9.95 EUR
incl. 19% VAT, plus shipping

  • Tiny size !

Interface : USB (no driver needed)
Dimensions : 8 cm x 5 cm x 1 cm (maximum sizes)

Here you can find some Freeware-programs for enhancing the use of the keyboard. eg. you can setup a reboot button,...
Autohotkey
KeyTweak
HotKeyz