[Haskell-cafe] Collection of objects?

Is some kind of collection of object with different types in Haskell exist? Except the tuples, which have fixed length. I find this * Tuples heterogeneous, lists homogeneous. * Tuples have a fixed length, or at least their length is encoded in their type. That is, two tuples with different lengths will have different types. * Tuples always finite. But I need something which is heterogeneous and non-fixed length. I'm used do Java, and this switch to functional languages is very strange to me. So, to be clear, I need something like LinkedList<Object> in java. Can you please help me or suggest me, what can I use in this case? Valentin