Apps similar to IrfanView include XnView MP, which is free for personal use. Other options are ImageGlass, nomacs, FastStone Image Viewer and qView. You're spoiled for choice with Image Viewers like IrfanView: we list more than 100 alternatives for Windows, Mac, Linux, the web and iPhone.
eom or the Eye of MATE is a simple graphics viewer for the MATE desktop which uses the gdk-pixbuf library. It can deal with large images, and can zoom and scroll with constant memory usage. Its goals are simplicity and standards compliance. Eye of MATE is a fork of Eye of GNOME.
imv(stb) is an extremely lightweight and fast image viewer/browser for the Windows platform. The current executable is about 70KB (without executable compression).
Fullscreen Photo Viewer is a program designed for high-quality viewing of high-resolution pictures on the computer screen. It renders the image using advanced scaling algorithm to fit the resolution of your monitor.
Sequential is an image viewer for Mac OS X. It was originally designed for opening a folder of images and displaying them in order. It works well for viewing comics and manga.
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With just one click you can change pictures' sizes, cut pictures to any size, add watermarks, write text on images, change colour values, convert pictures into other file formats and much more.
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GLiv is an OpenGL image viewer. Image loading is done via Gdk-pixbuf bundled with GTK+-2.6, rendering with OpenGL, and the graphical user interface uses GTK+ with GtkGLExt.
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DBGallery is a photo management database system enabling everyone in an organization to quickly access its digital photo assets. It operates in a shared multi-user environment.
qAllInOne (aka qAIO) is a free open-source software built using Qt to provide users an All-In-One media player, so it can view images, play videos and audio.
Open-source and cross-platform (UNIX, Mac OS X and Windows) picture manager / organizer written in Perl/Tk.
Galapix is an image viewer that allows you to directly zoom into large collection of tens of thousand of images from tiny thumbnails down to the images original size fluently with very short load times and no loss of interactivity.
