qt4 (a C++ graphical user interface toolkit, legacy version)

Qt is a complete and well-developed object-oriented framework for
developing graphical user interface (GUI) applications using C++.

This is an older 'legacy' version of Qt, only intended to support
older applications that have not yet been ported to Qt5. Don't use
this for developing new code.

If you're a SBo maintainer working on a script that requires qt4, see
README_SBo.txt for some helpful hints.