Top Alternatives to Nomacs

IrfanView is free image viewer application for Windows.

XnView is an efficient multimedia viewer, browser and converter.

FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.

ACDSee is an image organizer, viewer, and image editor programs for Windows, macOS and iOS.

Preview is the image viewer and PDF viewer of the macOS operating system.

JPEGView was a popular image viewer for Mac OS.

Gwenview is an image viewer for Linux, released as part of the KDE Applications bundle.

Xee is an streamlined and convenient image viewer and browser.

Geeqie is a lightweight Gtk+ based image viewer for Unix like operating systems.

Eye of GNOME is the official image viewer for the GNOME desktop environment, where it is also known as Image Viewer.

ImageGlass is a lightweight, versatile image viewing application that is designed to take the place of Photo Viewer in Windows.

Mylio is a photo organizer that slays your digital clutter.

Viewnior is a fast and simple image viewer for GNU/Linux.

Mirage is a fast and simple GTK+ image viewer. Because it depends only on PyGTK, Mirage is ideal for users who wish to keep their computers lean while still having a clean image viewer.

GPicView is a simple and Fast Image Viewer for X. screenshot.

PhotoQt is a simple, yet powerful and good looking image viewer, written in C++/Qt, published as open-source, and completely free.

Ristretto Image Viewer is an application that can be used to view, and scroll through images.