General Travel Info

Excellent flight tracking website with realtime tracking of planes as well as historic data on departures and arrivals (would be great if something like this would be available for trains).

https://www.flightradar24.com/

General international travel search engine (air, train, road, lodging)
http://www.rome2rio.com/
 
Public transportation in Skåne and the greater Copenhagen area.
http://www.skanetrafiken.se/
 
Public transportation in the greater Gothenburg area.
http://www.vasttrafik.se/sv/
 
Swedish trains.
http://www.sj.se/

Trains in Switzerland (including some international connections).
http://www.sbb.ch/en/
 
Trains in Germany.
http://www.bahn.de

Travel reimbursements: HR

Booking of travel:

booking of flights and hotel

booking of foreign trains