Popular links

Danish museums

• Experimentarium
• Steno Museet

Societies 

• Dansk Fysisk Selskab (DFS)
• PSI, website by physics students (University of Copenhagen)

Research institutions

• Niels Bohr Institutet
• Fysik på Århus Universitet
• CERN 

Link collections

• Fagenes infoguide
• Google Physics
• Yahoo Physics
• Intute Physics incl. new resources (with RSS feed)

Lectures online

• Quantum physics made relatively simple: Hans Bethe (Cornell)
• Vega Science Trust: TV programs, lectures and more

Fysiklinks

• http://www.physics.org/ Institute of Physics' (IoP) physics portal (you can make your own account)
• http://iopscience.iop.org/ Institute of Physics' platform to all IoP publications (you can make your own account)