[openstack] is a set of software components that provide common services for cloud infrastructure.
symphony
[symphony] An open-source cloud platform written in Go, heavily inspired from existing orchestrators (Docker Swarm, Kubernetes, OpenStack, tc) and developed weekly live at The Alt-F4 Stream on Twitch.
gRPC
[gRPC] is a modern open source high performance RPC framework that can run in any environment. It can efficiently connect services in and across data centers with pluggable support for load balancing, tracing, health checking and authentication. It is also applicable in last mile of distributed computing to connect devices, mobile applications and browsers to backend services.