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 focused on speed and simplicity, making it ideal for quick viewing and basic organization. In contrast, XnView offers a more comprehensive suite of tools for file management and editing, catering to users who need advanced features and batch processing.