PCOnHand.com
- Producer of a watch with computing power comparable to first Palms capable of off-line browsing and spreadsheet calculation. Shows off device, available software and screenshots.
- http://www.pconhand.com/

Xybernaut
- Research, development and commercialization of computer technology, hardware, and related software for wearable systems.
- http://www.xybernaut.com/

Charmed Technology, Inc.
- Offers wearable computer hardware, a smart badge, and an operating system. Publishes also board layouts and construction diagrams.
- http://www.charmed.com/