kshow is a very comfortable image viewer for KDE. Main features include DnD support, catalog view (different preview sizes), view a whole directory of images at once, have all pictures shown automatically and more.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.