This is a keyboard (layout) that you can install in Windows 7, 8, 8.1 and 10. The layout is closer to the classic Bamini keyboard layout for Tamil typing.
To install: Execute setup.exe and follow instructions.
To use/ enable: Go to controlpanel -> Language -> Click on 'Add a Language' to add Tamil (Sri Lanka) -> Once language is added, click on 'options' for this language -> Click on 'Add an input method' and follow instructions -> Once the keyboard 'Tamil - Bamini keyboard' is installed, you should find it available in the list of keyboards shown in system tray or in the windows language toolbar. ...
QVirtboard (Qt Virtual Keyboard) is a simple on-screen keyboard application, which extends its functionality in order to allow disabled people to control computer environment. This program can be used as a standard point-and-click virtual keyboard, as well as a more complex tool which can cooperate with web cameras or more sophisticated devices.