dsync synchronizes the contents of two directories or just performs a simple directory backup. It remembers state between invocations and tries to track and reconcile changes between successive runs and between independent synchronizations of multiple targets.
I-Spy grabs and compares contents of FTP directories and Web pages, from which it compiles a report and sends it via e-mail, saves it as HTML, or both.
Vacation is an e-mail auto-responder loosely based on the original by Larry Wall and Tom Christiansen. It is designed to emulate most vacation clones and specifically, the early Solaris version.