Free Virtual Keyboard - Free Virtual Keyboard is a free, lightweight, multilingual and finger friendly virtual keyboard.
Hot Virtual Keyboard - A replacement for Windows' built in virtual touch keyboard.
Click-N-Type - Click-N-Type virtual keyboard (on-screen keyboard) free software is an assistive technology for people with a physical disability involving motor skill impairment from spinal cord injuries, ALS, Muscular Dystrophy, Cerebral Palsy, Multiple Sclerosis…
On-Screen Keyboard Portable - a virtual keyboard to go
Onboard on-screen keyboard - An onscreen keyboard useful for tablet PC users and for mobility impaired users.
OptiKey - Optikey is a free suite of Windows applications that allow you to communicate and use your computer using only your eyes. The Optikey app family offers communication apps, mouse control and full typing and computer control.