PhotoQt is a simple, yet powerful and good looking image viewer, written in C++/Qt, published as open-source, and completely free. Developed by Lukas Spies
License: Open Source
PhotoQt is a lightweight image viewer with customization options and fast performance, ideal for users who prefer efficiency. Gwenview, while more resource-heavy, offers robust organization features and integration with KDE, making it suitable for users deeply embedded in the KDE ecosystem.