@lnxw48 VisualWorks is what we used at the office. I played around some with Dolphin, too. Tere's a steep learning curve to 'get' how it works, but once past that hurdle development can be very fast. But we found it rather lacking in the GUI development side. Still no better introduction to OOP, I think. That was 1998-2000 more or less - I don't know how it's developed since then.