I bought Noire from Native Instruments. It's got a Felt mode and a standard mode, and I think I noodle around with Felt more than the other one. It's dark, inspiring, and it has a number of really interesting features such as granular piano noises that seem to follow your playing.
Keep in mind, I have no idea how to actually play the piano.
An old friend once said that makes me a recording artist, not a musician. I can make something that sounds like piano music given time, many recordings later.
So, a small test of the Noire synth is below.