Wally is a Qt4 wallpaper / background changer. It uses multiple sources like files, folders, FTP remote folders, Flickr, Yahoo, Panoramio, Pikeo, Ipernity, Photobucket, Buzznet, Picasa and Smugmug images. It's available in many languages, and it supports Linux window managers are GNOME, KDE3, KDE4, XFCE4, BlackBox, FluxBox, Window Maker, and FVWM (experimental). It supports proxy configuration, and you can review all your photos using "history" feature.
Operating System Support: Mac OS X 10.5 Intel, Mac OS X 10.5 PPC