Unicode emoji data files

http://www.unicode.org/emoji

Library for single instance applications

https://wiki.gnome.org/Attic/LibUnique

Convert ASCII newlines between CR/LF and LF

ODBC library suite for Unix

http://www.unixodbc.org/

BYTE magazine's Public Domain benchmark for UNIX

https://github.com/kdlucas/byte-unixbench

Extract Makeself archives

Convert any document from and to any LibreOffice supported format

http://dag.wieers.com/home-made/unoconv/

Extract, view & test RAR archives

https://www.rarlab.com/

Lists/Extracts files from a "*.tgz" or "*.gz" archive

List, test, and extract compressed files from a ZIP archive

http://infozip.sourceforge.net/UnZip.html

Zoo archive extractor

http://freshmeat.sourceforge.net/projects/unzoo/

Universal Plug and Play Software Development Kit

http://pupnp.sourceforge.net/

D-Bus daemon for simplifying power management tasks

http://upower.freedesktop.org/

APC Smart UPS Monitoring Daemon

Ultimate Packer for eXecutables

https://upx.github.io/

URI parsing library

https://github.com/uriparser/uriparser

URL extractor/launcher

https://github.com/sigpipe/urlview

Another font package for X

Unicode TrueType fonts from URW extended by Valek Filippov

Database of all known IDs used in USB devices

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

Daemon for multiplexing connections over USB to iPhone/iPod Touch

http://www.libimobiledevice.org

FreeBSD userboot.so for bhyve

Simple, portable, lightweight library for handling UTF-8 strings

http://utfcpp.sourceforge.net/

UTF-8 processing library

https://juliastrings.github.io/utf8proc/

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/

Monospaced bitmap fonts for X11

https://people.mpi-inf.mpg.de/~uwe/misc/uw-ttyp0/

Video4Linux utilities

https://linuxtv.org/wiki/index.php/V4l-utils

Video4Linux IOCTL header files

https://linuxtv.org

Implementation of the UNIX 7th Edition shell

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

Open source JavaScript engine by Google

https://v8.dev/

Programming language and compiler that converts Vala code into C code

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

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

http://validator.w3.org/

High-performance HTTP accelerator

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

Open source Gameboy Advance emulator

http://vba.ngemu.com/

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

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

User-mode virtual ethernet infrastructure

https://github.com/virtualsquare/vde-2

Merchant Of Venice, a stock market trading program

http://mov.sourceforge.net/

Programming font with cursive italics and ligatures

https://rubjo.github.io/victor-mono/

Graphical class browser for Xt

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

VIGRA stands for "Vision with Generic Algorithms"

http://ukoethe.github.io/vigra/

Improved version of the vi editor (tiny flavor)

https://www.vim.org/

Improved version of the vi editor (console only)

http://www.vim.org/

VNC server that allows for remote access to your GNOME desktop

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

Toolkit to interact with virtualization capabilities

https://virt-manager.org/

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

http://victornils.net/tetris/

Locks a terminal

http://freshmeat.net/projects/vlock

Management system for bhyve virtual machines

https://github.com/churchers/vm-bhyve

Fast offline password cracker for VNC passwords

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

Multi-client VNC proxy server

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