Kirkesøk is a free website that “contains all the churches that belong under the Norwegian Church/Church of Norway. The data retrieved from the Church-building database, which is also operated by KA.”
“Norwegian church buildings are managed and operated by church councils. KA is a membership organization with the church councils as an important part of their membership.”
They have addresses, hours, contact information, photos, and historical information for each Norwegian church.
You can opt to view churches by address, by municipality, by epoch/age, or search for a church by other details. They also have an online exhibition with photos of church bells and map with ecclesiastical divisions in Norway (Sokn, Deanery, and Diocese).