XnView is a fast multi-format graphics browser, viewer, and converter. It can read more than 400 file formats, e.g. gif, bmp, jpeg, png, targa, multipage tiff, camera RAW, jpeg 2000, mpeg, Avi, Quicktime. EXIF & IPTC metadata are also supported. The image viewer has an Explorer-like browser that allows quick and simple browsing of directory contents. XnView supports red eye correction, crops and transforms JPG images losslessly, generates HTML pages and contact sheets, and provides batch conversion and batch renaming. Slide shows with transitions effects, screen capturing, WIA & TWAIN support (scanner & digital cameras), image comparison, file operations.
Thanks to SalaR for the update.