Linux
Android-X86, Debian,
Fedora,
Gentoo,
LineageOS, Mklinux,
Mint,
Open-SUSE,
Ubuntu,
Slackware Linux for Education & Kids
Edubuntu,
Epoptes,
Opensis,
Ubermix Linux: Enterprise Servers:
CentOS,
Lineox,
Red Hat,
ScientificLinux,
SUSE,
Ubuntu Linux for Very Old Hardware
Antix,
Budgie,
BunsenLabs,
DebianDog,
ElementaryOS,
LXLE,
Lite,
Lubntu,
PuppyLinux,
Slitaz,
Tyni Core,
Xubuntu,
Linux-Unix:
Distrotest,
Distrowatch,
Fink,
MacOSForge, UnixGuide,
GNU Hurd,
Unix History,
Commands,
Cheat-Sheet Unix:
ECos,
FreeBSD,
FreesBIE,
FuryBSD,
GhostBSD,
HelloSystem,
Illuos,
Minix3,
NetBSD,
OpenBSD,
OpenIndiana Other OSes:
GNU Hurd,
ReactOS,
Temple OS Oldies:
Apple Mcpaint,
AranyM ATARI Emulator,
AROS Amiga OS,
Amikit,
Aftershock,
AtheOS, Commodore Emulatiors:
MAME,
Vice,