I second the AnySoftKeyboard. It is nice alternative, however I miss the mode that resembles BlackBerry 10 keyboard, especially in case of autocompletion suggestions that popped over specific letter and I had to swipe it up [0] in order to complete the word. It was many times more pleasant to use than the "selection bar".

[0]: https://helpblog.blackberry.com/en/2013/02/blackberry-10-key...