Ultimate Packer for eXecutables

https://upx.github.io/ https://github.com/upx/upx

URL extractor/launcher

https://github.com/sigpipe/urlview

Database of all known IDs used in USB devices

http://www.linux-usb.org/

Daemon for multiplexing connections over USB to iPhone/iPod Touch

https://www.libimobiledevice.org

Lightweight UPnP (TM) A/V Media Server

http://ushare.geexbox.org/

hash table for C structures

http://uthash.sourceforge.net/

Library for uu/xx/Base64/BinHex/yEnc de-/encoding

http://www.fpx.de/fp/Software/UUDeview/

Video4Linux IOCTL header files

https://linuxtv.org

Implementation of the UNIX 7th Edition shell

http://minnie.tuhs.org/UnixTree/V7/

Emulates a MacPlus machine! Runs MacOS versions up to 7.5.5

http://www.vmac.org/

Programming language and compiler that converts Vala code into C code

https://wiki.gnome.org/Projects/Vala

Memory debugging and profiling tool

https://www.valgrind.org/

Markup Validation Service from the World Wide Web Consortium (W3C)

https://validator.w3.org/

High-performance HTTP accelerator

http://www.varnish-cache.org/

GNU VCDImager/VCDRip -- The GNU VideoCD Image Maker/Ripping Tool

https://www.gnu.org/software/vcdimager/

Video extension headers

http://www.freedesktop.org/wiki/Software/xlibs

Graphical class browser for Xt

https://gitlab.freedesktop.org/xorg/app/viewres

VIGRA stands for "Vision with Generic Algorithms"

https://ukoethe.github.io/vigra/

VNC client for the GNOME Desktop

http://www.gnome.org/projects/vinagre/

VNC server that allows for remote access to your GNOME desktop

https://wiki.gnome.org/Projects/Vino

virtio kernel modules port for 0.4

http://people.FreeBSD.org/~kuriyama/virtio/

vitetris is a terminal-based Tetris clone by Victor Nilsson.

http://victornils.net/tetris/

Curses based real-time logfile viewer esp. useful for ipflog

http://inc2.com/isba/index-vlog.html

Captures a VNC desktop session and saves as a flv

http://www.unixuser.org/~euske/python/vnc2flv

Fast offline password cracker for VNC passwords

http://www.randombit.net/projects/vnccrack/

Multi-client VNC proxy server

https://sourceforge.net/projects/vnc-reflector/

Play, encode, and manage Ogg Vorbis files

https://xiph.org/vorbis/

Client for Cisco 3000 VPN Concentrator

https://www.unix-ag.uni-kl.de/~massar/vpnc/

Collection of scripts to setup routes and other changes for a VPN

https://git.infradead.org/users/dwmw2/vpnc-scripts.git

Verify mail address

https://github.com/asxe/vrfy/

Terminal widget with improved accessibility and I18N support

http://www.gnome.org/

Terminal widget with improved accessibility and I18N support

https://wiki.gnome.org/Apps/Terminal/VTE

Vulnerability and eXposure Markup Language DTD

https://vuxml.freebsd.org/

VuXML Query Tool

Command-line utilities for reading Veritas Filesystem (VxFS)

Pager/text-based WWW browser

https://git.sr.ht/~rkta/w3m

Simple FTP client for GNUstep

http://www.roard.com/waiho/

PC-BSD's Jail Management Utility

http://wiki.pcbsd.org/index.php/Warden

Audio codec for lossless, lossy, and hybrid compression

https://www.wavpack.com/

Port of Linux USB webcam and DVB drivers into userspace

https://github.com/hselasky/webcamd

TrueType core fonts for the Web

Web-based firewall log analyzer

http://www.webfwlog.net

Qt WebKit implementation

http://qt-project.org

HTML validator and sanity checker

Google WebP image format conversion tool

https://developers.google.com/speed/webp/

Online Subversion repository browser

https://websvnphp.github.io/

WepLab is a tool designed to teach how WEP works

http://weplab.sourceforge.net

Fantasy turn-based strategy game

https://www.wesnoth.org/

Retrieve files from the Net via HTTP(S) and FTP

https://www.gnu.org/s/wget/

Easily convert between three common subnet mask notations

http://www.laffeycomputer.com/whatmask.html