I wrote the Amazon offering! By design I implemented the same PeerConnection API, I really didn't want their to be vendor lock-in. I included a 'signaling client' in-tree, but you can do your own easily. The end goal is to get that AWS implementation running on 'true' embedded devices. We are going to switch to mbedtls soon, and we are working on getting it on FreeRTOS.

I also wrote Pion WebRTC, the Amazon offering is just a re-implementation of that in C. Just trying to decouple media pipelines and transport. I think WebRTC is a really great protocol, hopefully we can get software to match it :)