kde3-gtk-qt-engine from home:Ansus:branches:KDE:KDE3 project
Select Your Operating System
Add repository and install manually
For KDE KDE3 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Ansus:branches:KDE:KDE3/KDE_KDE3_15.4/home:Ansus:branches:KDE:KDE3.repo zypper refresh zypper install kde3-gtk-qt-engine