My work-from-home workstation always has a VM or two running the test/dev environment for the tasks I'm working on at work. They are VBox instances provisioned/managed by Vagrant.
They are CentOS7 instances, each running a test database, usually a text editor, "tail -F" monitoring log output, and various daemons/services specific to my workplace's internal infrastructure. The host system is running Slackware 15.0.