FastStone Image Viewer, IrfanView, Microsoft Photos, Windows Photo Viewer, Picasa, ACDSee Photo Studio, XnView, Mylio, ImageGlass, XnView MP, Preview, gThumb, Gwenview, Windows Live Photo Gallery, HoneyView, Photo Mechanic, QuickViewer, Eye of GNOME, KPhotoAlbum, A Photo Manager, Xee, photos2webgallery, Ristretto, Xviewer, Prodibi, sxiv, Viewnior, Universal Viewer, eye of MATE, Fototriever, Imaginario, JPEGView, Visum Photo Viewer, Cluttr, Xlideit Image Viewer, Basic Photo Viewer, Arcane Marks, qimgv, Image Detail, PT Photo Editor, ViewPic, gimmage, GPicView, ThisLife, GQview, Maverick Photo Viewer, GImageView are some alternatives to Nomacs.