[Europa]

There are only two that I know of, but I can't think of the names right now. One adds frequently used keys to the main keyboard, like the semi-colon, but in doing so, it slightly decreases the size of the other keys. The other one changes the layout of the keyboard so the most used keys are biggest, to do this, it has to move the position of some of the other keys, so it's slightly not QWERTY anymore. It takes some getting used to, but it's supposed to increase your typing speed.

Let me know if you're interested in either of those, and I'll find out the names. I tried both of them for a few days, but uninstalled them and just went back to the standard keyboard in the end.