Lyft has a tech similar to linkerd called Envoy: https://github.com/lyft/envoy. It is a bit lower level than linkerd (based on APIs rather than already integrated with common services) and written in C++.

I'm working on an adapter which should offer a better integration with Kubernetes. The end goal is to have envoy be able to replace our Ingress controllers. Not having to run the JVM on every machine is also nice.