Linux can be used on much more than just a computer, as these five gadgets will prove. Which one is your favorite? Discuss here.

Linux-based Qtopia Greenphone

Trolltech’s Qtopia Greenphone is a Linux-based, quad band GSM/EDGE handset that boasts a QVGA touch screen display, 1.3-megapixel camera, 317MHz XScale processor, 128MB ROM, 64MB RAM, Bluetooth, and a miniSD card slot.

OLPC XO

The OLPC boasts a 500mhz Processor, Linux OS, 1GB Memory, and a Two-Mode Display (Color and B&W). It’s powered by AC or handcrank — users get approximatley 10 minutes of use with 1 minute of cranking. [Source]

Linux-Powered DIY Cat Feeder

That’s right, Lee Holmes has created a “Ubuntu Linux controlled DIY cat feeder and water dispenser.” Basically, Lee uses his “JasJar PDA phone to SSH into the box, and feed[s] the cats on demand just by running the script.”

The computer runs Ubuntu Linux, so a crontab entry controls the scheduling. The script calls eject /mnt/cdrom to open the CD Rom, delays, and eject –t /mnt/cdrom to close it again

[Source]

Wrist-Worn PC

This 7-ounce watch boasts a 2.8-inch touchscreen LCD display, SD card slot, Bluetooth, GPS receiver, WiFi, USB and support for Linux. [Source]

Moobella – The Robotic Ice Cream Vending Machine

The Moobella doesn’t impress with its looks, but it’s a robotic ice cream vending machine that delivers “right on the spot” ice cream when you want. Choose from twelve different ice cream flavors and throw in three mix-ins which include M&M’s, chocolate chips, peanut butter cups, and more. This machine is Linux-powered and has “distributed management”.

“Every consumer can become a Ben, or a Jerry,” the CEO says