These links concerns private flying in sweden, when other is not mentioned. I use these sites a lot, especially the GAFOR and the online Nav Log.
GAFOR general aviation forecast
CLOUDS (south sweden)
LLF Low Level Forecast
NOTAM Notice to Airmen (south sweden)
LFV FLIGHTPLAN Log In
ONLINE NAV LOG (java/ printable)
ATS FLIGHTPLAN (pdf)
NAV LOG (pdf)
AIP-GEN (General Aeronautical Information)
BCL-T (Traffic regulations)
AIP-ENR (Enroute Aeronautical Information)
AIC-VFR (Aeronautical Info Circular)
Towers of sweden A-R, S-Ö