I was actually thinking about writing one meself. My plan looked something like this: Raspberry Pi with a python script running that does microphone->speech re

I was actually thinking about writing one meself. My plan looked something like this: Raspberry Pi with a python script running that does microphone->speech recognition (I was going to use Google's dictation service, but you could do it however you want)->voice-API. The voice API will look something like a regular old REST API does, but for humans: it'll have a bunch of trigger words that would emulate API endpoints (e.g. "play" for music, "turn the lights" for light control, etc.) with the rest of the query being fed as the parameters. And anything that is unrecognized would be assumed to be a question and passed to WolframAlpha or something similar. Has anyone tried something along these lines?