PopChar - The character map that works!
Free Virtual Keyboard - Free Virtual Keyboard is a free, lightweight, multilingual and finger friendly virtual keyboard.
WinCompose - WinCompose supports the standard Compose file format.
Hot Virtual Keyboard - A replacement for Windows' built in virtual touch keyboard.
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.