vines draws vines (wandering plants made up mostly of stems and leaves) on your X11 or SunView screen. By default it draws in black and white, but color options (spring and fall) are provided. The vines can grow across the top of your screen and down the side, down from the top of your screen until they reach the bottom, or start from the center and wander all over the screen forever.
Visprint makes cool fractal fingerprint PNG images based on the contents of any file. The image will be different for almost every file with even slightly different contents. Visprint uses the IFS fractal generation process pioneered by Michael Barnsley. It is a way to create images that are self-similar to infinite depths. In other words, the picture is made up of smaller versions of itself. Visprint takes a hash function checksum as its input.
vlock is a program to lock one or more sessions on the Linux console. This is especially useful for Linux machines which have multiple users with access to the console. One user may lock his or her session(s) while still allowing other users to use the system on other virtual consoles. If desired, the entire console may be locked and virtual console switching disabled.
vmm is an easy-to-use and configurable commandline tool for administrators and postmasters, used to manage domains, alias-domains, accounts, and relocated mail users. It allows fast and easy management of mail servers. It's designed for installations using Dovecot and Postfix with a PostgreSQL backend.
vnStat is a console-based network traffic monitor that keeps a log of hourly, daily, and monthly network traffic for the selected interface(s). It uses the network interface statistics provided by the kernel as information source. This means that vnStat won't actually be sniffing any traffic, and also ensures light use of system resources.
vobps2fix is a tool that runs through a set of .VOB files created by dvdauthor and tweaks them so that the Playstation 2 will play them without pausing. The Playstation 2 is a bit finicky about the DVD format and pauses frequently when encountering certain timestamps, even if the DVDs work on other players.