Different cultivars of tomato; I grew all of them on my balcony in 2009! Those grown on the balcony are miles better than anything you get in the supermarket.
Lots of different vegetable varieties are obtainable in Austria. There is a large the farmers market in Graz (Kaiser-Franz-Joseph-Platz). There is also a very laudable organisiation, Arche Noah, for the conservation of old varieties http://www.arche-noah.at/etomite/index.php?id=52