The Babel Hostel is right next to the Central Station Wroclaw. It's backpacker accommodation, with huge shared rooms. Tiny and very friendly, with two bathrooms (you can be waiting a long time for a turn!) and a basic kitchenette where you have free tea and coffee 24 hours a day (and sometimes biscuits for dunking). There's wifi, and the recepcion staff are lovely. I felt almost at home. If you have to catch a train early in the morning, or you arrive late at night, this can be an excellent choice. The city centre is ten minutes walk away, and there are trams nearby.