Key Transformation 

Key Transformation can customize your keyboard layout, change any key on the keyboard to other keys. Its on-screen-keyboard ( soft keyboard ) is very easy to use.
change keyboard layout change keyboard mapping change keyboard keys replace key on keyboard key exchange key changer keyboard keys keyboard input mouse and keyboard on screen keyboard

R-WIN 2000 Keyboard Switch 

Keyboard extension utility for users working with two or more input locales at the same time (English, German, Russian, ...). Supports convenient hot keys, flag image on taskbar, small floating window, custom images and sounds assigned to language.
language input locale switch keyboard extension