Zooz, a Z-Wave device manufacturer and their retail store, The Smartest House are partnering with OpenHAB. They now list compatible North American & European devices in their retail store.
They have also promised access to new Zooz device on the day of release so we can add thm to the database. Please consider them when purchasing products for your smart home.
https://www.thesmartesthouse.com/collections/works-with-openhab
EDIT: They are discontinuing the European devices from the store.