Remember if the site is in Norwegian, it is easy to translate with Google translate or within Chrome.
Digital Archives – church books
https://www.digitalarkivet.no/en/search/sources
Church history
https://www.familysearch.org/wiki/en/Norway_Church_Records
Digital Archives – user guides
https://www.digitalarkivet.no/en/content/tutorials
Digital Archives – help
https://www.digitalarkivet.no/en/content/help
Digital Archives – photo archive
https://foto.digitalarkivet.no/fotoweb/
Digital Archives – advanced person search
https://www.digitalarkivet.no/en/search/persons/advanced
Digital Archives – find sources
https://www.digitalarkivet.no/en/search/sources
Probate – history, the law and more
https://www.familysearch.org/wiki/en/Norway_Probate_Records
Probate example
https://www.digitalarkivet.no/sk20090206660797 – right page
and page 88: http://xml.arkivverket.no/skifter/oppdalskifte3.pdf
Cleng Peerson
https://no.wikipedia.org/wiki/Cleng_Peerson – the Norwegian version is more informative than the English version
Emigration
https://www.familysearch.org/wiki/en/Norway_Emigration_and_Immigration
Norway Heritage
http://www.norwayheritage.com/
The Norwegian educational system
https://snl.no/Norsk_utdanningshistorie
Military
https://www.familysearch.org/wiki/en/Norway_Military_Records
Address books in the Digital archive
A blogpost – where to find address books