Filelight
Filelight – free and open source, multi-platform utility for viewing information about disk usage with a graphical interface from KDE
FSlint – utility to find and clean various forms of lint on a filesystem
Superpaper is a free and open-source, multi-platform software for automatically changing your desktop wallpaper with support for working with multiple monitors
BingWall – free and open source, utility to browse/download/setting bing’s wallpaper of the day to GNOME desktop
WallpaperDownloader – free and open source, software for downloading, managing and automatically changing wallpapers from the Internet for Linux
Variety – free and open source wallpaper downloader and manager for Linux systems