Inexpensive Portuguese classes for foreigners (Lisbon)

Hey everyone! I lived in Portugal last year, and paid 350E per month for about 8 hours of classes per week. I am moving back to Portugal next week, and I was hoping someone might have info about some free or inexpensive classes near Lisbon for foreigners. A friend of mine in the north is getting free classes from Lester Univ. Anyone know of anything like this? Thanks so much.