I'm trying to find my great grandmother's family. Can anyone suggest a good online resource to use please?

Here's what I know about the family:
Father: Christian Jensen
Mother: Nickolene Unknown

Children all born in Verup:
Anna Elizabeth Margaretha 23 Sep 1885
Axel after 23 Sep 1885
Ella after 23 Sep 1885
Inga after 23 Sep 1885
Jacob after 23 Sep 1885
Sophia after 23 Sep 1885
Mary about 1888

Any suggestions would be greatly appreciated. Thank you.