Like php-nuke, joomla and drupal? Seems wordpress kind a dominated market yet it's not even real CMS script, but blog script with ability to expand into CMS. And i find this annoying as now almost every site is powered by WP and they almost look same. I miss those times when there was tons of different CMS scripst with different layout and features.
Php nuke seems to be still alive -
https://www.phpnuke.org/