I was using Russian Keyboard since HTC Desire Z. It was good in remaping keys to comfortable work in ru layout. After Moving to Motorola Droid 4 I installed this app by good memory.
All as great, except the Shfit+3 combination, it doesn't type the # sign. Later I discover, that another layout must be selected, not English UK. But the first step was made after discovering code on github, which promise to make eng+ru+ua layouts and switchind them by CAPS key. Plus, there was ALT and CTRL keys, which I need to play Doom with comfort.