SyncWall is a basic wallpaper changer with a special feature, the ability to synchronize wallpaper changes between several workstations with a basic (and unsecured) client/server protocol. Each workstation must share the same pool of files, there is no FTP or Internet download. Other interesting features are simple multi-monitor support and the ability to add special effects to wallpaper.
The Auto Screenshot Utility for Linux allows users to capture screenshots at regular intervals. Configurable options allow control of the number of screenshots to capture. The capture time interval is also configurable from the main screen of the software. If your desktop environment supports a notification area, you can even minimize the main screen of the software to the notification area/system tray. The screenshot location is configurable as well.
Site Change Detection is a class that scans a directory to detect file changes. It performs an initial scan of a given directory and records the names and hashes of files found in a MySQL database. Subsequent scans detect any files that were added, changed, or deleted. The class can also setup the database tables to perform the initial configuration.