Matrix 1.0 and the Matrix.org Foundation
The not-so-talked-about but killer feature of Matrix is that you can bridge other services into it. I'm currently able to send and receive messages from Hangouts, iMessage, SMS, and Slack all from within Matrix. If I'm working on my laptop I can put my phone in my bag and not even touch it for 8 hours, because there's no need. I have Riot running on my laptop with a full keyboard and access to all my communication platforms.It's not exactly easy to do (iMessage requires a dedicated Mac, for example), but it's possible. And it works pretty well. Pulling out my phone to tap out an SMS when I have a full keyboard in front of me seems silly at this point. Hopefully the bridging will continue to evolve and become more accessible to the average user, because it's amazing.