mp3cd-tools packs directories of MP3 files in a space-efficient way, so that they can be burnt to CD-Rs for playing on an MP3 CD player. It takes a list of directories containing MP3 files, arranged in order of favoritism, and puts as much music as possible onto each disc. It is not necessary to burn all of the planned CDs at the same time.
The ECLiPt Mirroring Tool is a full featured FTP mirror script written in Python. It supports nice config files, many features for controlling the mirror (include, exclude of files, special watermarks for deleting files, download just the latest version of some program), as well as producing nice HTML output.
fsbackup is an incremental backup creation utility. It supports backup compression and encryption. Backups can be stored on the local file system, and a remote host (via SSH, or FTP). Some additional scripts allow backup SQL tables from PostgreSQL and MySQL, save system configuration files, and a list of installed packages. Backed-up files can be recovered, and system packages can be reinstalled.