Hi I would like to rent a room in Krakau, perfer the south of Krakau, closer to Krakau Business Park (ul. Krakowska  280,  32-080 Zabierzow,  Poland).
Could someone tell me what website I can use? or an agency I can call or some company?
Thank you

Its pretty easy to google these things dude...
Just google Hotels in Krakow (its Krakow in english. not krakau)

For cheap hostels and free couches to sleep on:
http://www.hostels.com/
http://www.couchsurfing.org/