PictureViewer is described as 'So then he inserted the SD card with some brand new photos' and is an app in the Photos & Graphics category. There are more than 25 alternatives to PictureViewer for a variety of platforms, including Windows, Linux, Mac, PortableApps.com and Xfce. The best alternative is IrfanView. It's not free, so if you're looking for a free alternative, you could try JPEGView or ImageMagick. Other great apps like PictureViewer are XnView (Free Personal), Preview (Free), qView (Free, Open Source) and Gwenview (Free, Open Source).
ImageMagick is a software suite to create, edit, and compose bitmap images. It can read, convert and write images in a variety of formats (about 100) including GIF, JPEG, JPEG-2000, PNG, PDF, PhotoCD, TIFF, and DPX.
Imagine is an Image & Animation Viewer for Windows with screen capture function. Features - View and save image/animation files with very fast speed - Support for numerous image/animation file formats: GIF, BMP, PNG, JPG, TIF, TGA, PCX, ICO, ANI, FLI, and many more...
Eye of GNOME is the official image viewer for the GNOME Desktop environment. With it, you can view single image files, as well as large image collections. The Eye of GNOME supports a variety of image file formats.