XnView is a fast multi-format graphics browser, viewer, and converter. It reads more than 400 file formats, e.g. gif, bmp, jpg, png, tiff, mpeg, avi, and many more. XnView has an Explorer-like viewer that allows quick browsing of directory contents in both thumbnail and preview views. Its features include contact sheets, twain support (scanner digital cameras), batch conversion, image processing with many filters and effects, and slide shows.