General Information:
EU-Community: http://eu-community.daad.de/index.php?id=56
EURES-Portal: https://ec.europa.eu/eures/main.jsp?acro=lw&lang=de&catId=490&parentId=0

Visa: 
Visa types and requirements: https://www.nyidanmark.dk/en-GB/You-want-to-apply

Entry and residence requirements:
Ministry of Foreign Affairs: um.dk/...

 Social insurance provisions:
Just landed - social security: justlanded.com/...

Insurance:
Health care in Denmark: justlanded.com/...

Tax regulations:
Danish Ministry of Taxation: skm.dk/...

Accommodation:
Just landed - Housing & Rentals: justlanded.com/...
Rooms for Rent: denmark.gabinohome.com/...
Bed & Breakfast: bedandbreakfast.dk/...
Bed & Breakfast: bbdk.dk/...
Boligdeal.dk: boligdeal.dk

Country information:
Wikipedia: wikipedia.org/...
Kwintessential - Doing Business in Denmark: www.kwintessential.co.uk/...
Culture Crossing: culturecrossing.net/...

Further information:
Tourist information: visitdenmark.com/...