Try contacting the Kosciuszko Foundation (kosciuszkofoundation. org, if I'm not mistaken). I know they have some Polish - US student exchange programs and scholarships in humanities, but I see no good reason for which they shouldn't help science / IT students as well.
Related:
US student wants to go to college in Poland. Advice needed.I am a US student trying to study in Poland....does anyone know of good colleges that offer courses in English.
Iwona: It depends in which town but I suppose Jagiellonia University in Krakow.iwona is right. I would add Wroclaw. They all have web pages, if you want to check.