Posted by LordOfBikes on
URL: https://forum.librecad.org/Very-Impressive-tp5723323p5723404.html

You can start with Qt 5.14, which is the last version with a setup package:
https://download.qt.io/archive/qt/5.14/5.14.2/

Due to changes in Qt's policy, since 5.15 there are no setup packages anymore.
It is still open source, and the community version is still usable under LGPL license, but they don't provide setup packages anymore.
You have to build it from source, what can become an obstacle for inexperienced users.

Armin