It's interesting how you see the same idea pop up in different forms over the years.
Two they missed: Lazarus (based on Delphi) and Qt. I've dabbled with Lazarus, people who use it a lot tell me it's great. I use Qt professionally and it's the most enjoyable way of building GUI applications that I've found.
Yes, Lazarus is decent. Others they missed from the client-server GUI tools are PowerBuilder and Gupta Technologies' SQLWindows (one of the first GUI development tools for Microsoft Windows):
Two they missed: Lazarus (based on Delphi) and Qt. I've dabbled with Lazarus, people who use it a lot tell me it's great. I use Qt professionally and it's the most enjoyable way of building GUI applications that I've found.