Ansible is open source software that automates software provisioning, configuration management, and application deployment. Ansible connects via SSH, remote PowerShell or via other remote APIs.
Docker Cloud allows IT Ops team to deploy & manage Dockerized applications, from single container apps to distributed microservices stacks to any infrastructure.
Gmail is a free, advertising-supported email service offered as part of Google's G Suite, with 15GB of storage, color-coded inbox filters and unsend button.