Mu4e - Starting with version 0.9.8, mu provides an emacs-based e-mail client which uses mu as its back-end: mu4e.
Docker - Docker is an open platform that enables developers and system administrators to create distributed applications.
Mutt - Mutt is a small but very powerful text-based mail client for Unix operating systems.
Google Kubernetes Engine - Google Kubernetes Engine is a powerful cluster manager and orchestration system for running your Docker containers. Set up a cluster in minutes.
Mailspring - Mailspring is a mail client for Mac, Windows and Linux.
OpenShift Container Platform - Red Hat OpenShift Container Platform is the secure and comprehensive enterprise-grade container platform based on industry standards, Docker and Kubernetes.