Countdown is a command-line program that is similar to the UNIX sleep command, but displays the amount of time remaining before the timeout.
sleepuntil is a mix of sleep(1) and at(1). It takes the same format of time as at(1), including "noon" or "teatime".
Software to decapsulate traffic encapsulated within IPIP, GRE, and ESP protocols.
Utilities for making and checking MS-DOS FAT filesystems.