If you have danish ancestors I can recommend these 100 % free genealogy sites:
It's in both deutsch and english - You just need to sign in, no credit card number needed. Here you can look up in churchbooks.
In both deutsch and english - Here you can search in danish census' and more...
- Danish genealogy group, Here you can get help to translate danish text and archive look up. Great forums.
Hope that it can help someone.
Have a good search.