This is not a standalone app, you need to download latest Go Keyboard app in order to apply this theme. You can download it here: http://goo.gl/A82zq0
How to apply:
Start Go Keyboard: Themes -> Tap on the small icon in top right corner -> Apply
Free sounds and fonts plugin available here: http://goo.gl/Os7j96
For any questions and suggestions email me at email@example.com
To avoid misunderstandings, it's highly recommended to use Google mail for your messages to me! Since the other mail services sometimes move your messages to the "spam" or my replies are lost.