Sabayon Linux
I used it for a few years, great distro. I think it's dead now. It was based on Gentoo but with thoughtful defaults and a very good binary package manager.
also Funtoo Linux, but i never really used it
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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Sabayon Linux
I used it for a few years, great distro. I think it's dead now. It was based on Gentoo but with thoughtful defaults and a very good binary package manager.
also Funtoo Linux, but i never really used it
Probably KaOS. It puts a strong focus on KDE and Qt.
As in, it doesn't package programs using different GUI toolkits, aside from the most popular, like Firefox and GIMP. When I tried it a few years ago, you also had to enable a separate repo to get access to these.
Reminds me of chakra linux. Same principals, except built on top of Arch base, and the other toolkit apps were distributed as self contained image files.
I used to run Reborn OS at around 2017 for a few years. It used Cnchi installer, just like Antergos, and when Antergos died, I saw Reborn as its successor. But the title went to Endeavour (why?) and Reborn never got popularity.
Clear Linux.
Hot Dog Linux, X11 Window Manager with Windows 3.1 Hot Dog Stand, Amiga Workbench, Atari ST GEM, Mac Classic and Aqua UI
I created a distro once for class that just had diaspora installed on a live CD. It was only used for demos a looong time ago. DiasporaTest.
I had no idea mageia existed until I met a dude who had it