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.
skill sends signals to processes given any combination of user names, ttys, commands, and pids. snice changes the priority of processes (given the same). They are similar to kill(1) and renice(8), but the commandline is order-independent. There are also verbose, search, and interactive modes of operation.
flexbackup is a configurable and easy to use Perl-based backup tool, that can backup local files as well as remote machines (using ssh). It allows the backup itself to be made with afio, cpio, tar, dump, star, or pax. It can work with tape drives, on-disk archive files, or on-disk directory trees.
bytecounter is a program that copies data while showing a status line indicating the data rate and estimated time remaining. Optionally, it retries on errors, which is useful for recovering files from bad media. It designed to be used "in-between" two programs to measure rate of data flow, such as between the output of a tar command and a file. It works with files, floppy disks, hard disks, terminals, tapes, CD-ROMs, FIFOs, and anything else you can think of.
rsyncbackup is a handy tool for scheduled backups using rsync. rsyncbackup lets you easily setup multiple source folders and destinations, both locally, on your iPod or external firewire disk, or at a remote destination using ssh. rsyncbackup has no GUI, but is based on editing configuration files. The script is meant to be run in a crontab, so user interaction is not neccesary. Basic terminal skills are required to use the program.