Hi,

I've used gkrellm for decades. But since glib2 and gtk2 was obsoleted by Arch, I couldn't compile it any more. So I've rewritten it.

https://bztsrc.gitlab.io/skrellm/

This is now glib and gtk-free. It is very lightweight (less than 400K single binary), Free and Open Source software, licensed under GPLv3+. I'm already using it in place of gkrellm, hope you'll like it too.
(ps: AUR package can be found in the repo's "distrib" directory.)