The Tunisian-Latin 101-key virtual keyboard for Windows supports the  Elyssa Alphabet 2.2. It is a customization of the Maltese 47-key keyboard layout, created using  Microsoft Keyboard Layout Creator 1.4.

Here's the layout:

Caps Lock stateOffOn
   

Tunisian (Tunisia) - Latin (101) QWERTY keyboard layout

Tunisian (Tunisia) - Latin (101) QWERTY keyboard layout

  +Shift

Tunisian (Tunisia) - Latin (101) QWERTY keyboard layout

Tunisian (Tunisia) - Latin (101) QWERTY keyboard layout

  +AltGR

Tunisian (Tunisia) - Latin (101) QWERTY keyboard layout

Tunisian (Tunisia) - Latin (101) QWERTY keyboard layout

  +Shift+AltGR

Tunisian (Tunisia) - Latin (101) QWERTY keyboard layout