This plugin will provide features like
1) An on-screen virtual keyboard embedded within the browser window which will popup when a specified entry field is focused.
2) The user can then type and preview their input before Accepting or Canceling.
3) Add custom keyboard layouts easily.
4) Add up to four standard key sets to each layout that use the shift and alt keys (default, shift, alt and alt-shift).
5) Add any number of optional modifier keys (meta keys) to add more key sets.
6) Each meta key set also includes the shift, alt and alt-shift keysets – New in version 1.8.9.
7) Position the keyboard in any location around the element, or target another element on the page.
8) Easily modify the key text to any language or symbol.
9) Allow direct input or lock the preview window.
For more detail features check this site Mottie keyboard plugin