Just had fro yo at a place in Waldwick called Yogybee...they had plain, choc, vanilla and strawberry and it was quite good! They also have make-your-own salads, wraps, etc.
There's also a tasti d lite in Englewood. In Garden State Plaza there is a self-serve place called 16 handles which has 8 rotating flavors and you pay by the weight.
----- Garden State Restaurant 287 Central Ave, Jersey City, NJ 07307