canteen (you may be sure that you will meet there some of our international students at any time). The full meal (soup with second course - some meat with potatoes or pasta, or rise... etc.) costs 10zl.
library - you may find there large collection of books in English
buffet at each faculty, where you can have a tea or coffee, piece of cake or a hamburger. At some faculties (like Biotechnology or a "Lodex" building) there are also full meals available.
free WiFi at almost all faculties and library
photocopy and printing services (prices vary, but generally copying one page should not be more than 0,15 zl - sometimes even 0,08 zl. It's important, when copying huge amounts of lecture notes :))
lots of pubs next to the Uni, where you can have a beer or play billiards during the break between the classes, or meet there in the evening - they are just in a three minute walk from any dorm.