As AcidBurnNSA said, Home Assistant is free, fully open-source and fully community driven - no company involved. We have over 240 components and platforms to include a wide range of products and services: https://home-assistant.io/components/
If you're attending OpenIoT Summit in San Diego, I'll be speaking tomorrow about Home Assistant 1:35pm - 2:25pm in Harbor Ballroom F: http://openiotelc2016.sched.org/event/6DBd/automating-your-h...
All videos will be recorded so you should be able to watch it online. I'm planning to give a similar talk soon at a Python SD user group meeting to practice for my PyCon 2016 talk.
You can find my sliders for tomorrow here: https://docs.google.com/presentation/d/1P2WsmwGSSni4gAriY5IA...
Good luck with your work, it looks really useful and interesting. I feel this is what we all dreamed up in the early internet years while watching Star Trek. Digital controls for everything, and not being beholden to others for the way in which we manage the controls.
I'm also interested in electricity monitors but I think that's a separate thing.