Delphi 7 Personal: 7.0 [verified]

The "RAD" in Rapid Application Development wasn't marketing hype. You could drag a button, edit box, and label from the component palette onto a Windows Form, double-click the button, type ShowMessage('Hello World'); , and hit F9. In less than 10 seconds, you had a compiled executable.

Unlike modern IDEs that require gigabytes of RAM, Delphi 7 starts in seconds. Its compiler is notoriously fast, turning thousands of lines of code into a standalone .exe almost instantly. Delphi 7 Personal 7.0