Parser for SVG content in files or buffers

http://cairographics.org/libsvg

GNU libc's sysinfo port for FreeBSD

https://github.com/bsdimp/libsysinfo

ASN.1 structure parser library

https://www.gnu.org/software/libtasn1/

Language guessing by N-Gram-Based Text Categorization

https://software.wise-guys.nl/libtextcat/

Text styling library

https://www.gnu.org/software/gettext/libtextstyle/manual/

Thai language support library

https://linux.thai.net/projects/libthai/

Theora video codec for the Ogg multimedia streaming system

https://www.theora.org/

Generic shared library support script

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

BitTorrent Library

https://github.com/rakshasa/libtorrent

Lightweight fully POSIX compliant regexp matching library

https://laurikari.net/tre/

Integer-only fully Ogg Vorbis compliant decoder library

https://xiph.org/vorbis/

User space caching library

http://mercurial.creo.hu/repos/libublio

Universal configuration library parser

https://github.com/vstakhov/libucl

libudev-compatible interface for devd

https://github.com/wulf7/libudev-devd

Library to manipulate storage devices, from udisks

https://www.freedesktop.org/wiki/Software/udisks/

Implementation of the line and word breaking algorithm for Unicode

https://vimgadgets.sourceforge.net/libunibreak/

Library for manipulating Unicode characters and strings

https://www.gnome.org/

Library of Unicode annotation data

https://github.com/fontforge/libuninameslist

Library for converting Unicode strings to numbers

http://billposer.org/Software/libuninum.html

Library for single instance applications

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

Unicode string library

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

RAR archive extraction library

https://www.rarlab.com/

Generic stack unwinding library

https://github.com/libunwind/libunwind https://www.nongnu.org/libunwind/

Userspace read-copy-update (RCU) data synchronization library

http://lttng.org/urcu

Communication interface library for usbmuxd

https://www.libimobiledevice.org

The uTorrent Transport Protocol library and sample utilities

https://github.com/bittorrent/libutp

Multi-platform support library with a focus on asynchronous I/O

https://github.com/libuv/libuv

Cross-platform library for USB video devices

https://libuvc.github.io/libuvc/

Video4Linux library

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

VAAPI wrapper and dummy driver

https://github.com/intel/libva

VAAPI wrapper for GLX

https://github.com/intel/libva

VDPAU wrapper and tracing library

https://freedesktop.org/wiki/Software/VDPAU

Toolkit to interact with virtualization capabilities

https://libvirt.org/

Glib bindings for Libvirt virtualization API

http://www.libvirt.org

Library and tools for parsing the visio file format structure

https://wiki.documentfoundation.org/DLP/Libraries/libvisio

Abstraction library that sits between apps and visual plugin

https://libvisual.sourceforge.net/

Provide an easy API to a custom vnc server

https://libvnc.github.io/

Library to provide file system type information

Audio compression codec library

https://xiph.org/vorbis/

VP8/VP9 reference encoder/decoder

https://www.webmproject.org/

Adds tablet support to libinput

https://github.com/linuxwacom/libwacom/wiki

String internment library

https://www.netsurf-browser.org/projects/libwapcaplet/

Tools and library for converting Microsoft WMF (windows metafile)

https://wvware.sourceforge.net/libwmf.html

Tools and library for converting Microsoft WMF (windows metafile)

https://wvware.sourceforge.net/libwmf.html

Library used for writing pagers and taskslists

https://www.gnome.org/

Library used for writing pagers and taskslists

http://www.gnome.org/

Tools for importing and exporting WordPerfect(tm) documents

http://libwpd.sourceforge.net/

Tools for importing and exporting WordPerfect(tm) documents

http://libwpd.sourceforge.net/

General-purpose library for WPE WebKit

https://wpewebkit.org/releases

Library and tools to work with WordPerfect Graphics (WPG) files

https://libwpg.sourceforge.net/