I see some relatively recent Xscreensaver releases, so that forum post might be wrong.
In any case, Xscreensaver's animations (called "hacks") are the best such collection for Linux that I know of.
I think they're also supported by gnome-screensaver and mate-screensaver, in case those appeal to you. I haven't checked KDE for compatibility (but maybe I should, since I prefer KDE).
Edit: By the way, Kodi is a media player/manager, not a screensaver.