Clonezilla is a partition or disk cloning tool similar to Symantec Ghost. It saves and restores only blocks in use on the hard drive if the file system is supported. For unsupported file systems, dd is used instead. It has been used to clone a 5 GB system to 40 clients in about 10 minutes.
Lease Parser saves lease states from an ISC DHCP server in a MySQL database, making it possible to tell which MAC address owned an IP at a particular time. If you need to track down a DHCP user for any reason, such as an abuse complaint for actions weeks beforehand, you can simply search the database via the Web form for the IP during the time in question. Then, search on the MAC address you obtained to see if the system is still on the network and what it's current IP is.
Sshbak is very simple but powerful and secure remote backup utility. It performs a fast and comprehensible daily (usually) backup of multiple machines via remote SSH connections. The result is a simple set of tar+gzip files. It supports the backup of piped program output (allowing remote backup of mysqldump or pg_dumpall results), parallel backup of different machines, and more.
Oracle online (hot) backup script is a multi-platform, storage independent, safe, and flexible online physical backup script for Oracle databases (of any version). It features database checks before backup; dynamic backup of instance datafiles, archives, and configuration files; extensive error detection over all steps involved in the process; a clean and easy-to-read log with timestamps for each step; detailed error messages for troubleshooting; and more.
Yessh is a bash program that uses the SSH client. It provides fast connections to Linux/Unix hosts. Just type the name you have chosen for a host, and yessh will connect you via SSH. You don't need to remember the IP address, hostname, login, or password; just one arbitrary name. Accounts with passwords are kept in a secure file where passwords are encrypted using OpenSSL with 128-bit AES. You can use the autoconnect function to connect to your server with 5 keypresses.