I'm not aware of an all in one solution, but this appears to be the ZWave solution. There's a lot of different ZWave modules out there...

As for other devices needing a neutral wire, that's actually not always the case. The GE switches I picked up from Radio Shack needed neutral, but these days most of the ones you'll find don't. At least the cheap ones don't. You can actually find ZWave switches at Lowe's now, usually around their Iris stands.

The nicer switches/dimmers usually require neutral. You also need neutral if you want to use LED bulbs.