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 and customizable image viewer focused on speed and basic organization, while Nomacs offers more advanced editing features and extensive organizational tools. Users seeking a simple, fast viewer may prefer PhotoQt, whereas those needing robust editing and batch processing capabilities will find Nomacs more suitable.