IrfanView
Free Personal
IrfanView is free image viewer application for Windows.
FastStone Image Viewer
Free Personal
FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
JPEGView
Open Source
JPEGView was a popular image viewer for Mac OS.
Mylio
Freemium
Mylio is a photo organizer that slays your digital clutter.
XnView
Free Personal
XnView is an efficient multimedia viewer, browser and converter.
ACDSee
Commercial
ACDSee is an image organizer, viewer, and image editor programs for Windows, macOS and iOS.
ImageGlass
Open Source
ImageGlass is a lightweight, versatile image viewing application that is designed to take the place of Photo Viewer in Windows.
PhotoQt
Open Source
PhotoQt is a simple, yet powerful and good looking image viewer, written in C++/Qt, published as open-source, and completely free.
Compare Nomacs with alternatives
Compare FastStone Image Viewer and Nomacs and decide which is most suitable for you.