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.
Handykey Corporation: Sells combination of chording keyboard and mouse, called Twiddler, that weighs 4 ounces and fits in the palm of a hand.
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.
Kitty: Typing by touching the thumbs with different fingers and at different positions analog to a normal keyboard. With Flash demo, prototype photos and press overview.
L3 Systems: Manufacturer of a 39-keys wrist-worn PC keyboard as well as customized keyboard controllers.
Lightglove: Air typing by blocking watch-like attached lasers with fingers. Presents some infos on technology, photos and the patent abstract.
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.
Thumbscript: Offers hard- and software solutions for entering text using a thumb-operated 9-keys keyboard.
WetPC: Makes an intuitive human machine interface suitable for wearable, handheld, underwater and mobile computing.