Portable ASCII art graphics library

C++ Common Libraries

Codec library for encoding and decoding AV1 video streams

Concurrency framework for C++11

Light UNIX download accelerator

Cross platform file encryption utility using blowfish

Arbitrary precision numeric processing language

High performance key/value database

Implementation of the DNS protocols

Yacc-compatible Parser generator

Rust and C implementations of the BLAKE3 cryptographic hash function

Collection of portable C++ source libraries

Generic-purpose lossless compression algorithm by Google

Burrows–Wheeler-based data compression library and utilities with high compression ratio

Vector graphics library with cross-device output support

Asynchronous DNS library

Modern, C++-native, header-only, test framework

Object-file caching compiler wrapper

C unit testing framework

Ultralightweight JSON parser in ANSI C

Cross-platform make

Copies files into or out of a cpio or tar archive

Unit testing framework for C++

Cross platform C99 library to get cpu features at runtime

CPU INFOrmation library

Implementation of CRC32C with CPU-specific acceleration

Lightweight unit testing framework for C

Get a file from an HTTP, HTTPS or FTP server

Lightweight C++ command-line option parser

Small static webserver without CGI

a POSIX-compliant implementation of /bin/sh that aims to be as small as possible

AV1 decoder targeted to be small and fast

File comparison utilities

Debug versions of system memory management routines

Binary-decimal and decimal-binary routines for IEEE doubles

XML 1.0 parser

ISO AAC audio encoder

ISO AAC audio decoder

Standalone library of the Fraunhofer FDK AAC code from Android

Play, record, convert, and stream audio and video

C routines to compute the Discrete Fourier Transform

Utility to determine file types

Collection of GNU find, xargs, and locate

User-friendly command-line shell for UNIX-like operating systems

Free lossless audio codec

Fast Lexical Analyzer, generates Scanners (tokenizers)

Open-source formatting library for C++

XML-based font configuration tools

Software library to render fonts

Software library to render fonts

Implementation of the Unicode BiDi algorithm

Command-line fuzzy finder written in Go

GNU awk utility

GNU database manager

Toolkit for image loading and pixel buffer manipulation

C++ geography library

GNU internationalization (i18n) and localization (l10n) library

Library for processing command-line flags

GitHub command-line tool

Library and utilities for processing GIFs

Core application library for C

Application-level logging library

GNU multiple precision arithmetic library

Convert text strings to printed bars

GNU File, Shell, and Text utilities

GNU Pretty Good Privacy (PGP) package

GNU implementation of the famous stream editor

GNU version of the tar archiving utility

GNU Transport Layer Security (TLS) Library

GNU implementation of which utility

C++ microbenchmark support library

Google's C++ Testing and Mocking Framework

Perfect hash function generator

Smart font renderer for non-Roman scripts

Graph visualization software from AT&T and Bell Labs

GNU grep, egrep and fgrep

Popular GNU data compression program

OpenType text shaping engine

hexdump library and cli

Minimalistic client for Redis

C library for high-throughput sequencing data formats

Portable abstraction of the hierarchical topology of modern architectures

C/C++ and Java libraries for Unicode and globalization

a command-line tool to manage apps on iOS devices

Library of 2D and 3D vector, matrix, and math operations

Image loading and rendering library

Integer Set Library for the polyhedral model

WebSocket client and server, and HTTP client command-line tool

C library for encoding, decoding, and manipulating JSON

Library for manipulating JPEG-2000 images

JBIG2 decoder and library (for monochrome documents)

Image manipulation library

Lightweight and flexible command-line JSON processor

Library for interacting with JSON

JSON parser for C

Library for JSON, based on GLib

JSON for modern C++

High quality MPEG Audio Layer III (MP3) encoder

Color management engine supporting ICC profiles

Adaptive Entropy Coding implementing Golomb-Rice algorithm

Multi-format archive and compression library

Assuan IPC Library

Implementations for atomic memory update operations

a password hashing method based on the Blowfish block cipher, provided via the crypt(3) and a reentrant interface.

Library for writing preformatted data onto optical media: CD, DVD and BD (Blu-Ray)

Convert pixel information into colored ASCII art

CDDB server access library

Compact Disc Input and Control Library

CSS parsing and manipulation toolkit for GNOME

Open h.265 video codec implementation

Heavily optimized DEFLATE/zlib/gzip compression and decompression

BSD-style licensed readline alternative

Asynchronous event library

Asynchronous event library

EXIF parsing library

Portable Foreign Function Interface library

Cryptographic library based on the code from GnuPG

C library of Git core methods that is re-entrant and linkable

Common error values for all GnuPG components

charset conversion library

International domain name library (IDNA2008, Punycode and TR46)

International domain name library

Library to communicate with iOS devices natively

Frontend for libraries libburn and libisofs

Library to create an ISO-9660 filesystem with extensions like RockRidge or Joliet

JPEG image codec that aids compression and decompression

New file format for still image compression

X.509 and CMS library

C/C++ seam carving library

C library for the MaxMind DB file format

Unified display of technical and tag data for audio/video

C library to parse Metalink XML files

Go-style concurrency in C

C library for the arithmetic of high precision complex numbers

Ogg Bitstream Library

Packet(TCP/IP) Capture libray

C++ Phone Number library by Google

Library for manipulating pipelines of subprocesses in a flexible and convenient way

Library for Apple Binary- and XML-Property Lists

Library for manipulating PNG images

C library for the Public Suffix List

Library for complex text layout

Library for sample rate conversion of audio data

C/C++ implementation of a Sass compiler

Library to Access SMI MIB Information

C library for files containing sampled sound

A modern, portable, easy to use crypto library.

C library for reading and writing PNG format files

C library implementing the SSH2 protocol

ASN.1 structure parser library

TIFF library and utilities

Generic library support script

BitTorrent library with a focus on high performance

an efficient feature complete C++ bittorrent implementation focusing on efficiency and scalability.

line breaking and word breaking algorithms

C string library for manipulating Unicode strings

Portable UPnP development kit

USB multiplexor library for iOS devices

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

Perceptual video quality assessment based on multi-method fusion

Vorbis General Audio Compression Codec

Image format providing lossless and lossy compression for web images

GNOME XML library

C XSLT library for GNOME

YAML Parser

C library includes YUV conversion and scaling functionality

Unified display of technical and tag data for audio/video

C library for reading, creating, and modifying zip archives

High-performance, asynchronous messaging library

Lynx-like WWW browser that supports tables, menus, etc.

http_parser replacement

Lightning memory-mapped database: key-value data store

PNG encoder and decoder in C and C++

Logging Framework for C++

A fast, small, safe, gradually typed embeddable scripting language derived from Lua

Text-based web browser

Extremely Fast Compression algorithm

LZMA-based compression program similar to gzip or bzip2

File compressor

Real-time data compression library

Macro processing language

Static reflection for enums (to string, from string, iteration) for modern C++

Utility for directing compilation

Cryptographic & SSL/TLS library

C Markdown parser. Fast. SAX-like interface

Unified display of technical and tag data for audio/video

Zip file manipulation library with minizip 1.x compatibility layer

C library for zip/unzip via zLib

implements the zlib (RFC 1950) and Deflate (RFC 1951) compressed data format specification standards.

Improved JPEG encoder

C library for multiple-precision floating-point computations

MP3 player

Multiple Precision Integers and Rationals (fork of GMP)

Library for a binary-based efficient data interchange format

Socket library in C

Free (GNU) replacement for the Pico text editor

Netwide Assembler (NASM) is an 80x86 assembler

Text-based UI library

Low-level cryptographic library

HTTP/2 C Library

HTTP/3 library written in C

HTTP(S) server and reverse proxy, and IMAP/POP3 proxy server

QUIC library written in C

Nanomsg-next-generation -- light-weight brokerless messaging

New GNU portable threads library

Platform-neutral API for system-level and libc-like functions

Not Too Bad TLS library

Light and powerful C++ web framework for highly scalable and resource-efficient web application

Regular expressions library

Implementation of the OpenAL 3D audio API

Optimized BLAS library

High dynamic-range image file format

Library for JPEG-2000 image manipulation

High quality, portable, open source libm implementation

High performance message passing library

Cryptography and SSL/TLS Toolkit

Audio codec

Library to load and enumerate PKCS#11 modules

a packrat parser generator for C

Apply a diff file to an original

Perl compatible regular expressions library with a new API

Perl compatible regular expressions library

Low-level library for pixel manipulation

C library for multimedia protocols such as SIP, SDP, RTP and more

Manage compile and link flags for libraries

Reimplementation of pkg-config

PNG image optimizing utility

Library like getopt(3) with a number of enhancements

Protocol Buffers(data interchange format) compiler and library developed by Google

Seamless operability between C++11 and Python

C++ functions matching the interface and behavior of python string methods with std::string

QR Code generation

Small and embeddable JavaScript engine

JSON parser/generator for C++ with SAX and DOM style APIs

Generate C-based recognizers from regular expressions

Alternative to backtracking PCRE-style regular expression engines

Library for command-line editing

Utility for computing and verifying hash sums of files

Utility that provides fast incremental file transfer

Tool for downloading RTMP streaming media

Ncurses BitTorrent client based on libtorrent-rakshasa

Low-level access to audio, keyboard, mouse, joystick and graphics

Compression/decompression library aiming for high speed

Audio processing library

Super fast C++ logging library

Speex audio processing library

Audio codec designed for speech

Command-line interface for SQLite

Generate scripting interfaces to C/C++ code

Audio metadata library

C test project

Official documentation format of the GNU project

Open video compression format

a simple, small, efficient, C++ XML parser library

TOML for Modern C++

TOML config file parser and serializer for C++

Display directories as trees (with optional color/HTML output)

Validating, recursive, caching DNS resolver

Maintained ctags implementation

Extract, view, and test RAR archives

Extraction utility for .zip compressed archives

single header utf8 string functions for C and C++

Clean C library for processing UTF-8 Unicode data

UTF-8 with C++ in a Portable Way

Collection of Linux utilities

Compiler for the GObject type system

High performance WebAssembly interpreter

C++ websocket client/server library

Embedded SSL Library written in C

H.264/AVC encoder

H.265/HEVC encoder

ISO9660+RR manipulation tool

High-performance, high-quality MPEG-4 video library

Extremely fast non-cryptographic hash algorithm

General-purpose data compression with high compression ratio

YAML parser and emitter written in C++ for YAML 1.2 spec

Yet another assembler, a complete reimplementation of NASM

The fastest JSON library in C

Compression and file packaging/archive utility

Zlib replacement with optimizations for next generation systems

General-purpose lossless data-compression library

Zstandard is a real-time compression algorithm

File transfer program