There is a tremendous amount of support available online in Denmark - you can do practically everything without ever leaving home. The links below are loosely ranked in order of usefulness and relevance.  If you don't read danish, you may need to ask friends for help or even call the organisation in question - in my experience if you ask politely in English most Danes are friendly and helpful on the phone. 

 
www.virk.dk
A goldmine of information and electronic forms.  You can download your competitors' latest public accounting records (for a nominal fee) using CVR.dk, submit approval forms for any kind of business requirement (from running a restaurant to transporting dangerous goods), read about Danish labor law, and look up hundreds of other templates and forms.
(DK only)

www.webreg-portal.dk
Register your company in Denmark without getting up from your chair. A sub-site to the above Virk, which can be used to register, deregister or change information about your business.
(DK only)

www.100svar.dk
One hundred answers. A neat site with a nicely visual presentation of the basics for entrepreneurs and smaller businesses. Provides detailed answers to a number (139) of the most commonly asked practical questions about entrepreneurship, within marketing, income tax, paper work, public advice and control institutions, advisers, financing, VAT, legal matters, and so on.
(DK, EN, and Arabic!)

www.startguiden.dk
Publicly financed portal, offering guidance on the different steps to be taken when setting up and developing a company. Supplies tools, checklists and information on various matters, such as taxes, financing, and marketing for all types of companies, at all stages. Also provides links to the regional 'Vaeksthus' (growth houses).
(DK only)

www.ivaekst.dk
Growth portal for small and medium-sized companies (in Danish). Provides free of charge advice on starting up, growth and development. Access to practical advice and knowledge on matters from marketing and risk management to accounting and leasing.
(DK only)

www.fist.dk
Website for the Ministry of Science, Technology and Innovation. Provides general information about the Danish innovation and research environment, as well as info on various funding sources for certain types of projects
(DK, EN)

www.teknologiportalen.dk
Portal developed by GTS - Advanced Technology Group, a network of independent Danish research and technology organisations in various industries. Provides information on technology, innovation and business development courses, consultancy services and job opportunities in Denmark.
(DK, EN)

www.techtrans.dk
Open forum for public research institutions, private businesses and others looking for information about the innovative collaboration between researchers and companies.
(DK, EN)

www.foranet.dk
FORA is the Research and Analysis division of the ministry of Enterprise and Construction Authority.