Yunk is not very defined xD lol. Santiment just seems something that I'd use so it's easy to back that project. IOTA on the other hand seems well made for the IoT game so I'm just hedging some over there..
Santiment: https://docs.google.com/document/d/1hHmJQWrPrObSgCA8kTbk-4LgqGbYzukQAjtg5b8jwc0/edit
IOTA: http://www.tangleblog.com
I was kind of hoping it was like alternative or new wave haha. Ok, thanks for links. I'll take a look at them.