Software
Keyboard Skins for iPhone
Keyboard Skins for iPhone is known as a keyboard extension that comes with cool designs, colors, and customizable stuff that change your standard keyboard theme.
Phraseboard Keyboard
Phraseboard Keyboard is a free to use mobile application that customizes and categorizes your Keyboard with easy to access phrase.
Live Keyboard Plus
Live Keyboard Plus is a keyboard application designed for both personal and professional use.