[jonathonf]

Devuan [1] and MX Linux [2] (Debian-like), Artix (Arch-like) [3], and Void [4] are four other systemd-free distros off the top of my head. There will be others.

[1] https://devuan.org/ [2] https://mxlinux.org [3] https://artixlinux.org/ [4] https://voidlinux.org/

[pmoriarty]

On Gentoo one is not forced to use systemd. I myself run a Gentoo system without systemd, and it works great.