qView - a simple, fast image viewer for Linux
qView is a simple, minimalistic and fast image viewer for Linux, Windows and macOS. It's built using Qt and is GPL v3 licensed free software. It supports pretty much all features that one expects from a fast and no-nonsense image viewer. It has replaced Gwenview as the default image viewer on my KDE Plasma Fedora desktop. Gwenview is of course more feature-rich and fancier, but I like qView for simply viewing and cycling through images.