The Cwicly toolkit includes a theme and a plugin. The theme is a blank slate block-based theme for use with the Full Site Editor. The plugin provides a "themer" area, where you can create your theme templates using the Full Site Editor. It also has a role editor for controlling access to features, a large number of Gutenberg blocks, and a greatly enhanced Gutenberg editor. You can use Cwicly for regular content creation, but the real strength is that it greatly enhances the Full Site Editor.