Envoy Proxy open source communication bus in modern C++ 11
This product initially developed by Lyft is now an open source project in the Cloud Native Computing Foundation
Envoy Proxy's website
From the docs:
The network should be transparent to applications. When network and application problems do occur it should be easy to determine the source of the problem.


The STE||AR Group has released V1.0 of HPX -- A C++ Standard library for parallelism and concurrency.