Arctic Circle Norway
Lots of information about accommodations, culture and activities ranging from fishing and hunting to hiking and caving.

Norwegian Tourist Board
A wide range of information, from hiking locations to events.

Swedish Lappland
Lots of information about attractions, activities and accommodations, from the Swedish Lapland Economic Association.

Swedish Travel & Tourism Council
A vast array of information on everything from history to airlines to cultural events.

Travel in Finland
Information on hundreds of events, and regional and specific attractions and services.