My Linux virtual machines

I'm a Linux user since 1999 and apart from using Slackware Linux the most, I'm using also other distributions from time to time in my work (e.g. RadHat Linux now Fedora, SuSE Linux now OpenSuSE Leap) and my personal projects and experiments (Debian, Ubuntu, CentOS and others). In 2009 I've built my virtual server based on VMware ESXi hypervisor, with the main idea to be able to build Slackware packages for different releases and both x86 and x86_64 architectures. So I currently have:

• Slackware [#30 в DistroWatch currently]:
  
  • 11 Slackware virtual machines (from 11.0 to 14.2 plus -current);
  • 7 Slackware64 virtual machines (from 13.0 to 14.2 plus -current);
• Debian 9.3 (Stretch) with Linux 4.9 and GNOME 3.22 [#3 in DistroWatch currently];
• Ubuntu 17.10 (Artful Aardvark) with Linux 4.13 and GNOME 3.26 [#4 in DistroWatch currently];
• Fedora 27 with Linux 4.15 and GNOME 3.26 [#8 in DistroWatch currently];
• OpenSuse Leap 42.3 (20170911) with Linux 4.4 and KDE Plasma 5.8 [#10 in DistroWatch currently];
• CentOS 7 (release 1708) with Linux 3.10 and GNOME 3.22 [#13 in DistroWatch currently];
• Gentoo (in process of re-installation) [#42 в DistroWatch currently].

And I updated all these (23+1) today :-)

I'm accessing these virtual machines by SSH and NoMachine (for desktops). Being a person of various interests I'm using Oracle Express Edition 11g R2, MySQL, MariaDB и PostgreSQL database systems, different applications like Oracle SQL Developer, MySQL Workbench, PgAdmin III, Meld, kdesvn, Calibre and many others on these virtual machines.

Here below some screenshots:

How many virtual machines are you running in your home environment?