FastStone Image Viewer, IrfanView, Simple Gallery, ImageGlass, XnView MP, HoneyView, nomacs, Free Opener, Phototheca, Tonfotos, JPEG to PDF, Ristretto, sxiv, Fullscreen Photo Viewer, Viewnior, JPEGView, Visum Photo Viewer, Cornice, Galapix, GIF Viewer, AniView, Open Freely, ImgV64, FuturixImager are some alternatives to Microsoft Photos.