Parser for SVG content in files or buffers

http://cairographics.org/libsvg

Sysctl MIB-Tree API (improved version)

https://gitlab.com/alfix/sysctlmibinfo2/

GNU libc's sysinfo port for FreeBSD

https://github.com/bsdimp/libsysinfo

Unified library for Chinese text processing

https://libtabe.sourceforge.net/

ASN.1 structure parser library

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

Library for communicating with Apple's Tatsu Signing Server

https://www.libimobiledevice.org

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/

Low-level C Library to implement TLSRPT into a MTA

https://github.com/sys4/libtlsrpt

Comprehensive, modular, and portable cryptographic toolkit

https://libtom.net/

Comprehensive, modular, and portable mathematical routines

https://libtom.net/

TOMOE GTK library

http://tomoe.sourceforge.jp/

Generic shared library support script

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

BitTorrent Library

https://github.com/rakshasa/libtorrent

C++ library implementing a BitTorrent client

https://libtorrent.org https://github.com/arvidn/libtorrent

C++ library implementing a BitTorrent client

https://libtorrent.org https://github.com/arvidn/libtorrent

Lightweight fully POSIX compliant regexp matching library

https://laurikari.net/tre/

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

UDF reader for media players

https://code.videolan.org/videolan/libudfread/

Library to manipulate storage devices, from udisks

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

Reference codec for the Ultra HDR format

https://developer.android.com/media/platform/hdr-image-format https://github.com/google/libultrahdr

Implementation of the line and word breaking algorithm for Unicode

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

Library for manipulating Unicode characters and strings

http://www.gnome.org/

Library of Unicode annotation data

http://libuninameslist.sourceforge.net/

Library for converting Unicode strings to numbers

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

Library for single instance applications

http://live.gnome.org/LibUnique

Unicode string library

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

Library to work with RAR archivies

http://www.rarsoft.com/

Generic stack unwinding library

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

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

http://lttng.org/urcu

Communication interface library for usbmuxd

http://www.libimobiledevice.org

The uTorrent Transport Protocol library and sample utilities

https://github.com/bittorrent/libutp

Library to generate or parse 128-bit Universally Unique IDs (UUIDs)

https://github.com/util-linux/util-linux

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

http://freshmeat.net/projects/libv4l

VAAPI wrapper and dummy driver

https://github.com/intel/libva

VAAPI wrapper for GLX

https://github.com/intel/libva

VDPAU wrapper and tracing library

http://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

http://libvisual.sourceforge.net/

Provide an easy API to a custom vnc server

http://libvnc.github.io/

Audio compression codec library

https://xiph.org/vorbis/

VP8/VP9 reference encoder/decoder

https://www.webmproject.org/