Keyboards and Directional Input

FrogPad
One-handed 3x5 USB keyboard with "patented" key layout but no straps. On-line available are a shop, training material and licensing ideas for different devices.
http://www.frogpad.com

Handykey Corporation
Sells combination of chording keyboard and mouse, called Twiddler, that weighs 4 ounces and fits in the palm of a hand.
http://www.handykey.com/

Inference Group - Dasher Project
A software solution for entering text by zooming through letters. A graphical demo, versions for different systems and languages and ideas for appropriate input hardware are provided.
http://www.inference.phy.cam.ac.uk/dasher/

L3 Systems
Manufacturer of a 39-keys wrist-worn PC keyboard as well as customized keyboard controllers.
http://l3sys.eskimo.net/

Lightglove
Air typing by blocking watch-like attached lasers with fingers. Presents some infos on technology, photos and the patent abstract.
http://www.lightglove.com/

Matias Half Keyboard
One-handed keyboard for PDAs and PCs. Special version with straps available. Use is explained in a flash demo and a downloadable one.
http://www.matias.ca/halfkeyboard/index.php?refID=7

Thumbscript
Offers hard- and software solutions for entering text using a thumb-operated 9-keys keyboard.
http://www.thumbscript.com

WetPC
Makes an intuitive human machine interface suitable for wearable, handheld, underwater and mobile computing.
http://wetpc.com.au/