[sitekit_pages]
* list
* columns - css columns
* cards - flexbox

[sitekit_posts]
* recent posts
* popular posts - sorted by comment count

Shortcodes:
* [sitekit_date] - https://wordpress.org/plugins/extra-shortcodes/ 

========== Maybe ==========
* [widget] authors - https://wordpress.org/plugins/widgets-reloaded/
* [widget] rss-feed - show (checkboxes) posts rss-feed, comments rss-feed, and show category rss-feed on category page (on author page too)