Some of my pull requests to CoreDNS where merged and released in the last time. You can find the summary of my submits here.
CoreDNS is a DNS server. It is written in Go. It can be used in a multitude of environments because of its flexibility. CoreDNS is licensed under the Apache License Version 2, and completely open source. Development takes place on Github. Some devs hang out on Slack on the #coredns channel.
Project link: https://coredns.io/
Docker Machine is a tool that lets you install Docker Engine on virtual hosts, and manage the hosts with docker-machine commands. You can use Machine to create Docker hosts on your local Mac or Windows box, on your company network, in your data center, or on cloud providers like Azure, AWS, or DigitalOcean.
Project link: https://docs.docker.com/machine/