

nomacs is described as 'Free, open source image viewer, which supports multiple platforms. You can use it for viewing all common image formats including RAW and psd images' and is a very popular Image Viewer in the photos & graphics category. There are more than 50 alternatives to nomacs for a variety of platforms, including Windows, Linux, Mac, Flathub and Xfce apps. The best nomacs alternative is IrfanView. It's not free, so if you're looking for a free alternative, you could try IrfanView or XnView MP. Other great apps like nomacs are XnView Classic, FastStone Image Viewer, qView and Gwenview.




File Viewer for Android is a free universal file viewing utility that can open over 150 file types on your Android device.v.






Use Fototriever’s camera to take a picture, then tag it and save it. When you want to find it at any time, just use voice or text command to instantly get it.



Redact & Annotate images. Hide or mark up essential parts of your image by simply clicking and dragging on it.






Create lovely photo web galleries directly from your Photos library on Mac. Share the generated HTML output folder with your family and friends in any possible way – e.g., via your personal website or external storage.




QIV is a very small and pretty fast gdk/Imlib image viewer. Runs on Linux, Solaris(SunOS), FreeBSD and HP-UX.
Features:
moving & zooming image in fullscreen mode. setting image as x11 background (centered,tiled,stretched..) with user settable background col.




GImageView is a yet another image viewer which solves hopless situation under displaying a lot of images. It provides not only viewing image function but also managing image files function which looks like expolore of MS-Windows or tabbed web browser.




The Document Reader scan and find a list of all documents on your phone, allowing you to quickly open, read, and manage your documents in one convenient place.



Gimmage is a small gtk image viewer, perfect for command line usage as it accepts directories and image filenames as arguments. It also has a filechooser integrated into the main UI, making accessing images and directories a snap.