Here are some links that can give you useful information about Niš and Serbia

Studentski Kulturni Centar Niš
http://www.skc-nis.com/

Inter Rent A Car Niš
http://www.rentacarnis.com/

Niš Tourism
http://www.nistourism.org.rs/index_eng.php

Serbia Tourism
http://www.serbia-tourism.org/

National Tourist Organisation of Serbia
http://www.serbia.travel/

Niš Weather Forecast
http://www.wunderground.com/global/stations/13388.html

Niš Ekspres Bus Transport
http://www.nis-ekspres.rs/

Niš Airport
http://www.nis-airport.com/

Bahn.de
http://www.bahn.de/

The Ministry of Foreign Affairs of Serbia - Consular Affairs
http://www.mfa.gov.rs/Consularaffairs.htm

Automobile and Motorcycle Association of Serbia
http://www.amss.org.rs/index_e.html

Serbian Raillways
http://www.serbianrailways.com/

GIS Niš - Map of Niš
http://gis.ni.rs/

Niš - Wikitravel
http://wikitravel.org/en/Nis