The AddOn demo_addon
shows the structure and basic functionality of AddOns and many examples of REDAXO functions for use in your own AddOns. The addon or just parts of it can / should be used for the development of your own AddOns.
Extensions to the demo_addon
AddOn, like PR (pull request) or notes or improvements as an issue.
package.yml
rex_list
and rex_form
(incl. Example table)documentation
plugin as the basis for help / documentation for REDAXO add-ons