List of open source code libraries

Library Name	Programming Language	Open Source License
class="wikitable sortable" \|+ List of open-source code libraries{{Cite web\|url=https://www.zdnet.com/article/the-top-1000-open-source-libraries/\|title=The top 1,000 open-source libraries\|website=ZDNET}}{{Cite web\|url=https://daily.dev/blog/top-open-source-libraries-for-web-development\|title=Top Open-Source Libraries for Web Development\|website=daily.dev}}{{Cite web\|url=https://www.e2enetworks.com/blog/top-23-ai-open-source-software-libraries\|title=Top 23 AI Open Source Software Libraries\|website=www.e2enetworks.com}}
Accord.NET libraries	C#	{{open source\|LGPLv3, GPLv3}}
Apache Lucene	C#	{{open source\|Apache-2.0}}
ASP.NET Core	C#	{{open source\|MIT}}
Dapper ORM	C#	{{open source\|Apache-2.0}}
EDXL Sharp	C#	{{open source\|MIT}}
Framework Class Library	C#	{{open source\|MIT}}
Infer.NET	C#	{{open source\|MIT}}
Math.NET Numerics	C#	{{open source\|MIT}}
ML.NET	C#	{{open source\|MIT}}
NHibernate	C#	{{open source\|LGPL-2.1}}
OpenTK	C#	{{open source\|MIT}}
SignalR	C#	{{open source\|MIT}}
Standard Libraries (CLI)	C#	{{open source\|MIT}}
Apache Portable Runtime	C	{{open source\|Apache License 2.0}}
Automatically Tuned Linear Algebra Software	C, Fortran	{{open source\|BSD License}}
Binary File Descriptor library	C	{{open source\|LGPL-2.1-or-later}}
C POSIX library	C	{{open source\|LGPL, MIT, BSD}}
C standard library (libc)	C	{{open source\|ISO/IEC 9899}}
Cairo	C	{{open source\|GPLv2}}
Chipmunk	C	{{open source\|MIT}}
Core Foundation	C	{{open source\|Apple Public Source License}}
DirectFB	C	{{open source\|LGPL-2.1}}
Expat	C	{{open source\|MIT}}
Fast Artificial Neural Network	C	{{open source\|GPL}}
FFmpeg	C	{{open source\|LGPL/GPL}}
FreeTDS	C	{{open source\|MIT}}
FreeType	C	{{open source\|FTL}}
Fontconfig	C	{{open source\|MIT}}
GD Graphics Library	C	{{open source\|MIT}}
GDK	C	{{open source\|LGPL-2.1}}
GEGL	C	{{open source\|GPL-3.0}}
GIO	C	{{open source\|LGPL-2.1}}
GLib	C	{{open source\|LGPLv2.1}}
GNet	C	{{open source\|LGPL-2.1}}
glibc	C	{{open source\|LGPL-2.1-or-later}}
GNU Libtool	C	{{open source\|GPL-3.0}}
GNU Multiple Precision Arithmetic Library	C	{{open source\|GPL-3.0}}
GNU portability library	C	{{open source\|GPL-3.0}}
GNU Portable Threads	C	{{open source\|LGPL-2.0}}
GNU Readline	C	{{open source\|GPL-3.0-or-later}}
GNU Scientific Library	C	{{open source\|GPL}}
GnuTLS	C	{{open source\|LGPL-2.1-or-later}}
GObject	C	{{open source\|LGPL}}
GTK library	C	{{open source\|LGPL-2.1+}}
GTK Scene Graph Kit	C	{{open source\|LGPL-2.1}}
IUP	C	{{open source\|MIT}}
Libart	C	{{open source\|LGPL-2.0-or-later}}
libavcodec	C	{{open source\|LGPL-2.1}}
libcurl	C	{{open source\|curl License/MIT}}
libdca	C	{{open source\|GPL-2.0}}
libevent	C	{{open source\|MIT}}
libffi	C	{{open source\|MIT}}
libfixmath	C	{{open source\|MIT}}
libjpeg	C	{{open source\|Custom BSD-like}}
Libpcap	C	{{open source\|BSD-3-Clause}}
libpng	C	{{open source\|libpng License}}
LibRaw	C	{{open source\|GPL-2.0}}
LibreDWG	C	{{open source\|GPL-3.0}}
LibreSSL	C	{{open source\|ISC}}
Librsvg	C	{{open source\|LGPL-2.1}}
libsndfile	C	{{open source\|LGPL-2.1}}
LibTIFF	C	{{open source\|LibTIFF License}}
libusb	C	{{open source\|LGPL-2.1}}
libuv	C	{{open source\|MIT}}
Libt2n	C	{{open source\|GPL-2.0}}
LibVNCServer	C	{{open source\|GPL-2.0}}
libvpx	C	{{open source\|BSD-2-Clause}}
libxml2	C	{{open source\|MIT}}
libxslt	C	{{open source\|MIT}}
Little CMS	C	{{open source\|MIT}}
LZFSE	C	{{open source\|Apache-2.0}}
Mbed TLS	C	{{open source\|Apache-2.0}}
Mesa	C	{{open source\|MIT}}
MsQuic	C	{{open source\|MIT}}
MuJoCo	C	{{open source\|Apache-2.0}}
MuPDF	C	{{open source\|AGPL-3.0}}
Mustache	C	{{open source\|MIT}}
ncurses	C	{{open source\|MIT}}
Netpbm	C	{{open source\|MIT}}
Nettle	C	{{open source\|GPL-2.0-or-later}}
Newt	C	{{open source\|MIT}}
nghttp2	C	{{open source\|MIT}}
OpenGL Utility Library	C	{{open source\|SGI Free Software License B}}
OpenJPEG	C	{{open source\|GPL-2.0}}
Oracle Berkeley DB	C	{{Open source\|Dual-licensed GNU AGPL}}
Pango	C	{{open source\|LGPL}}
Perl Compatible Regular Expressions	C	{{open source\|BSD}}
PROJ	C	{{open source\|MIT}}
libpthread	C	{{open source\|GPL-2.0-or-later}}
raylib	C	{{open source\|zlib}}
Seed	C	{{open source\|MIT}}
Simple DirectMedia Layer	C	{{open source\|Zlib License}}
SVGALib	C	{{open source\|LGPL-2.1}}
Systemd libraries	C	{{open source\|LGPL-2.1-or-later}}
Tk	C	{{open source\|BSD-style}}
UMFPACK	C	{{open source\|LGPL-2.1}}
Vorbis	C	{{open source\|BSD}}
VDPAU libvdpau	C	{{open source\|MIT}}
XCB	C	{{open source\|MIT}}
Xft	C	{{open source\|MIT/X}}
Xlib	C	{{open source\|MIT}}
XMLStarlet	C	{{open source\|MIT}}
zlib	C	{{open source\|Zlib}}
Zopfli	C	{{open source\|Apache-2.0}}
Allegro	C, C++	{{open source\|zlib}}
ARToolKit	C, C++	{{open source\|GPL}}
DevIL	C, C++	{{open source\|LGPL-2.1}}
FFTW	C, OCaml	{{open source\|GPL-2.0-or-later}}
GraphicsMagick	C, C++	{{open source\|ImageMagick License}}
ImageMagick library	C, C++, Perl, Python, Ruby, Java, PHP	{{open source\|ImageMagick License}}
International Components for Unicode	C, C++, Java	{{open source\|ICU-4.0}}
libcamera	C, C++	{{open source\|GPL-2.0}}
Math Kernel Library	C, C++, DPC++, Fortran	{{open source\|Apache License 2.0}}
libSass	C, C++	{{open source\|MIT}}
libSBML	C, C++	{{open source\|LGPL-2.1}}
LibX	C, C++, Python	{{open source\|MIT}}
MoltenVK	C, C++	{{open source\|MIT}}
Netlib	C, C++, Fortran, MATLAB	{{open source\|Public Domain}}
SQLite	C, C++, Swift, Python, Java	{{open source\|Public domain}}
OpenSSL	C, C++	{{open source\|Apache 2.0}}
PLplot	C, C++, Fortran, Java, OCaml, Python, Tcl	{{open source\|LGPL}}
PowerToys	C, C++	{{open source\|MIT}}
VDPAU	C, C++	{{open source\|MIT}}
Windows Template Library	C, C++	{{open source\|CPL, MPL}}
Armadillo	C++	{{open source\|MPL 2.0}}
Asio	C++	{{open source\|Boost Software License}}
Bitpit	C++	{{open source\|LGPL-3.0}}
Boost	C++	{{open source\|Boost Software License}}
Botan	C++	{{open source\|MPL-2.0}}
C++ Standard Library	C++	{{open source\|GPL-3.0-or-later}}
Caffe	C++	{{open source\|BSD}}
CAPD	C++	{{open source\|GPL-3.0}}
CGAL	C++	{{open source\|GPL-3.0}}
Cinder	C++	{{open source\|MIT}}
ClanLib library	C++	{{open source\|zlib}}
Class Library for Numbers	C++	{{open source\|GPL}}
CppUnit	C++	{{open source\|GPL-3.0}}
Crypto++	C++	{{open source\|Boost Software License}}
deal.II	C++	{{open source\|GPL-3.0}}
Dlib	C++	{{open source\|Boost Software License}}
Effi libraries	C++	{{open source\|GPL-3.0}}
Eigen	C++	{{open source\|MPL2}}
fastText	C++	{{open source\|MIT}}
FLTK	C++	{{open source\|LGPL-2.0-or-later}}
Geospatial Data Abstraction Library	C++	{{open source\|MIT}}
General Polygon Clipper	C++	{{open source\|zlib}}
GLFW	C++	{{open source\|Zlib License}}
Google Test	C++	{{open source\|BSD-3}}
HarfBuzz	C++	{{open source\|MIT}}
Insight Segmentation and Registration Toolkit	C++	{{open source\|Apache-2.0}}
Jackets library	C++, MATLAB	{{open source\|Apache 2.0}}
JSBSim	C++	{{open source\|GPL-3.0}}
JUCE	C++	{{open source\|GPL-3.0}}
KDE Frameworks	C++	{{open source\|LGPL-2.1+}}
LEMON	C++	{{open source\|LGPL-3.0}}
LevelDB	C++	{{open source\|BSD}}
Libdash	C++	{{open source\|MIT}}
libLAS	C++	{{open source\|LGPL-2.1}}
libsigc++	C++	{{open source\|LGPL}}
LIVE555	C++	{{open source\|GNU GPL}}
Metakit	C++	{{open source\|MIT}}
Microsoft SEAL	C++	{{open source\|MIT}}
Loki library	C++	{{open source\|Boost Software License}}
mlpack	C++	{{open source\|Apache 2.0}}
Mobile Robot Programming Toolkit	C++	{{open source\|BSD-3-Clause}}
Open Asset Import Library	C++	{{open source\|LGPL}}
Open Cascade libraries	C++	{{open source\|LGPL 2.1 only}}
OpenFOAM	C++	{{open source\|GPLv3}}
OpenImageIO	C++	{{open source\|Apache-2.0}}
OpenNN	C++	{{open source\|GPL}}
OpenVDB	C++	{{open source\|MPL-2.0}}
openFrameworks	C++	{{open source\|MIT}}
OpenRTM-aist	C++	{{open source\|LGPL-2.1}}
Orfeo toolbox	C++	{{open source\|CeCILL-2.1}}
OR-Tools	C++	{{open source\|Apache-2.0}}
PhysX SDK	C++	{{open source\|BSD-3}}
POCO C++ Libraries	C++	{{open source\|MIT}}
Poppler	C++	{{open source\|GPL-2.0-or-later}}
Protocol Buffers	C++	{{open source\|BSD-3-Clause}}
Qt	C++	{{open source\|GPL 2.0, 3.0 / LGPL 3.0}}
QuantLib	C++	{{open source\|GPL-2.0}}
RocksDB	C++	{{open source\|Apache 2.0}}
ROOT	C++	{{open source\|GNU GPLv3}}
Scintilla	C++	{{open source\|MIT}}
Simple and Fast Multimedia Library	C++	{{open source\|Zlib License}}
Skia Graphics library	C++	{{open source\|BSD}}
Snappy	C++	{{open source\|BSD}}
Standard Template Library (STL)	C++	{{open source\|None (Standard C++)}}
Stapl	C++	{{open source\|BSD}}
SymbolicC++	C++	{{open source\|GNU GPL}}
TBOX	C++	{{open source\|MIT}}
TerraLib	C++	{{open source\|GPL-3.0}}
Tesseract OCR	C++	{{open source\|Apache 2.0}}
Threading Building Blocks	C++	{{open source\|Apache 2.0}}
ThreadWeaver	C++	{{open source\|GPL-2.0}}
TinyXML	C++	{{open source\|Zlib}}
VTD-XML	C++	{{open source\|Apache License 2.0}}
wxWidgets	C++	{{open source\|wxWindows Library Licence}}
x265	C++	{{open source\|GPLv2}}
Apache MXNet	C++, Python, Julia, R	{{open source\|Apache License 2.0}}
ALGLIB	C++, C#, Python, Java, Lua	{{open source\|LGPL}}
CMU Sphinx	C++, Java	{{open source\|Apache 2.0}}
Data Analytics Library	C++, Java, Python	{{open source\|Apache 2.0}}
fastText	C++, Python	{{open source\|MIT}}
OpenCV	C++, Python, Java	{{open source\|Apache 2.0}}
Shogun (toolbox)	C++, Python, Java	{{open source\|GPL}}
Microsoft Cognitive Toolkit	C++, Python	{{open source\|MIT}}
Robot Operating System library	C++, Python, Lisp	{{open source\|Apache-2.0}}
XGBoost	C++, Python, R	{{open source\|Apache License 2.0}}
Apache SINGA	Python, C++	{{open source\|Apache-2.0}}
AppJar	Python	{{open source\|Apache 2.0}}
Astropy	Python	{{open source\|BSD-3}}
Beautiful Soup	Python	{{open source\|MIT for version 4 and later}}
Biopython	Python	{{open source\|BSD}}
Chainer	Python	{{open source\|Apache 2.0}}
CatBoost	Python	{{open source\|Apache 2.0}}
CheetahTemplate	Python	{{open source\|MIT}}
Construct	Python	{{open source\|MIT}}
Cubes	Python	{{open source\|GPL-3.0}}
CuPy	Python	{{open source\|MIT}}
Dask	Python	{{open source\|BSD-3}}
DEAP	Python	{{open source\|MIT}}
DeepSpeed	Python	{{open source\|Apache-2.0}}
Genshi	Python	{{open source\|BSD-3}}
Gensim	Python	{{open source\|LGPL-2.1}}
Graph-tool	Python	{{open source\|GPL-3}}
Horovod	Python	{{open source\|Apache 2.0}}
JAX	Python	{{open source\|Apache-2.0}}
Jinja	Python	{{open source\|BSD-3}}
Keras	Python	{{open source\|MIT}}
Mako	Python	{{open source\|MIT}}
Manim	Python	{{open source\|MIT}}
Matplotlib	Python	{{open source\|PSF 2.0}}
mlpy	Python	{{open source\|GPL-3.0}}
MNE-Python	Python	{{open source\|BSD-3}}
Natural Language Toolkit	Python	{{open source\|Apache 2.0}}
NeuroKit	Python	{{open source\|MIT}}
NetworkX	Python	{{open source\|BSD-3}}
NumPy	Python	{{open source\|BSD-3}}
OceanParcels	Python	{{open source\|MIT}}
OpenAI Gym	Python	{{open source\|MIT}}
Orange	Python	{{open source\|GPL-3.0-or-later}}
Pandas	Python	{{open source\|BSD-3}}
Plotly.py	Python	{{open source\|MIT License}}
ProbLog library	Python	{{open source\|MIT}}
PsychoPy	Python	{{open source\|GPL-3.0}}
pvlib python	Python	{{open source\|MIT}}
Pygame	Python	{{open source\|LGPL}}
Pyglet	Python	{{open source\|MIT}}
PyGObject	Python	{{open source\|LGPL-2.1 or later}}
PyMC	Python	{{open source\|Apache 2.0}}
Python Imaging Library	Python	{{open source\|Python Imaging Library License}}
PyroBot library	Python	{{open source\|MIT}}
PyTorch	Python	{{open source\|BSD-3}}
PyTorch Lightning	Python	{{open source\|Apache 2.0}}
Qiskit	Python	{{open source\|Apache License 2.0}}
Query Abstraction Layer	Python	{{open source\|MIT}}
RDFLib	Python	{{open source\|MIT}}
RDKit	Python	{{open source\|BSD-3}}
Requests	Python	{{open source\|Apache 2.0}}
RPyC	Python	{{open source\|GPL-2.0}}
Sage Manifolds	Python	{{open source\|GPL-3.0}}
scikit-image	Python	{{open source\|BSD-3}}
scikit-learn	Python	{{open source\|BSD-3}}
scikit-multiflow	Python	{{open source\|BSD-3}}
SciPy	Python	{{open source\|BSD-3}}
SimpleITK	Python	{{open source\|Apache 2.0}}
spaCy	Python	{{open source\|MIT}}
SQLAlchemy	Python	{{open source\|MIT}}
SQLObject	Python	{{open source\|MIT}}
Storm	Python	{{open source\|MIT}}
SymPy	Python	{{open source\|BSD-3}}
TensorFlow	Python	{{open source\|Apache 2.0}}
Theano	Python	{{open source\|MIT}}
TomoPy	Python	{{open source\|BSD-3}}
Transformers Library	Python	{{open source\|Apache License 2.0}}
VPython	Python	{{open source\|Licenses vary}}
wxPython	Python	{{open source\|wxWindows License}}
XDMF	Python	{{open source\|BSD-3}}
Angular Material	TypeScript	{{open source\|MIT}}
AngularJS Material	TypeScript	{{open source\|MIT}}
D3.js	JavaScript	{{open source\|BSD-3}}
Babylon.js	JavaScript	{{open source\|Apache-2.0}}
BioJS	JavaScript	{{open source\|MIT}}
Blockly	JavaScript	{{open source\|Apache License 2.0}}
Bootstrap	JavaScript	{{open source\|MIT}}
Chart.js	JavaScript	{{open source\|MIT}}
D3.js	JavaScript	{{open source\|BSD-3}}
Dojo Toolkit	JavaScript	{{open source\|BSD-3}}
Express.js	JavaScript	{{open source\|MIT}}
Google Closure Library	JavaScript	{{open source\|Apache-2.0}}
jQuery	JavaScript	{{open source\|MIT}}
Lodash	JavaScript	{{open source\|MIT}}
MathJax	JavaScript	{{open source\|Apache 2.0}}
Polymer	JavaScript, HTML	{{open source\|MIT}}
Processing libraries	JavaScript	{{open source\|MIT}}
RGraph	JavaScript	{{open source\|MIT}}
Raphaël	JavaScript	{{open source\|MIT}}
React	JavaScript	{{open source\|MIT}}
Three.js	JavaScript	{{open source\|MIT}}
Velocity	JavaScript	{{open source\|MIT}}
Vue.js	JavaScript	{{open source\|MIT}}
Webix	JavaScript	{{open source\|GNU-GPL, MIT, BSD, via FLOSS}}
WinJS	JavaScript, TypeScript	{{open source\|MIT}}
RiTa	JavaScript, Java	{{open source\|GPL-3.0}}
Apache Ant repository	Java	{{open source\|Apache 2.0}}
Apache Calcite	Java	{{open source\|Apache-2.0}}
Apache Commons	Java	{{open source\|Apache 2.0}}
Apache CXF	Java	{{open source\|Apache 2.0}}
Apache Empire-db	Java	{{open source\|Apache 2.0}}
Apache Lucene	Java	{{open source\|Apache 2.0}}
Apache Maven	Java	{{open source\|Apache 2.0}}
Apache OpenNLP	Java	{{open source\|Apache 2.0}}
Apache PDFBox	Java	{{open source\|Apache 2.0}}
Apache Phoenix	Java	{{open source\|Apache License 2.0}}
Apache POI	Java	{{open source\|Apache 2.0}}
Apache Velocity	Java	{{open source\|Apache 2.0}}
Apache Xalan	Java	{{open source\|Apache 2.0}}
Apache Xerces	Java	{{open source\|Apache 2.0}}
Apache XMLBeans	Java	{{open source\|Apache-2.0}}
BioJava	Java	{{open source\|LGPL-2.1}}
Bouncy Castle (cryptography)	Java	{{open source\|MIT}}
Cassowary	Java	{{open source\|MIT}}
Chemistry Development Kit	Java	{{open source\|LGPL 2.0}}
Colt	Java	{{open source\|EPL-1.0}}
Cytoscape	Java	{{open source\|LGPL-2.1}}
Deeplearning4j	Java	{{open source\|Apache-2.0}}
Dom4j	Java	{{open source\|GNU Lesser General Public License}}
Exp4j	Java	{{open source\|Apache License 2.0}}
Flying Saucer	Java	{{open source\|LGPL-2.1}}
GNU Classpath	Java	{{open source\|GPL-2.0}}
Google Guava library	Java	{{open source\|Apache-2.0}}
Google Guice	Java	{{open source\|Apache-2.0}}
Google Web Toolkit	Java	{{open source\|Apache-2.0}}
Gson	Java	{{open source\|Apache-2.0}}
Infinispan	Java	{{open source\|LGPL-2.1-or-later}}
iText	Java	{{open source\|AGPL-3.0}}
Jackson	Java	{{open source\|Apache-2.0}}
Javolution	Java	{{open source\|LGPL-2.1}}
Java Class Library	Java	{{open source\|GPL-2.0}}
JavaFX	Java	{{open source\|GPL-2.0-or-later}}
Java-gnome	Java	{{open source\|LGPL-2.1}}
Java OpenGL	Java, C	{{open source\|BSD}}
Jblas: Linear Algebra for Java	Java	{{open source\|LGPL-3}}
JFace	Java	{{open source\|EPL-2.0}}
JFugue	Java	{{open source\|Apache-2}}
jMusic	Java	{{open source\|GPL-2}}
jsoup	Java	{{open source\|MIT}}
JUnit	Java	{{open source\|EPL 2.0}}
LibGDX	Java	{{open source\|Apache License 2.0}}
Log4j	Java	{{open source\|Apache 2.0}}
LWJGL	Java	{{open source\|BSD}}
Mallet	Java	{{open source\|Apache-2.0}}
MOEA Framework	Java	{{open source\|GPL-3.0}}
Netty	Java	{{open source\|Apache-2.0}}
Neuroph	Java	{{open source\|Apache License 2.0}}
ObjectWeb ASM	Java	{{open source\|LGPL-3.0}}
OjAlgo	Java	{{open source\|Apache-2.0}}
OpenPDF	Java	{{open source\|GPL-2.0}}
Open Source Physics	Java	{{open source\|GPL-2.0}}
OpenWire	Java	{{open source\|Apache-2.0}}
Parallel Colt	Java	{{open source\|GPL-3.0}}
Parboiled	Java	{{open source\|Apache-2.0}}
Processing	Java	{{open source\|GPL-2.0}}
Quartz	Java	{{open source\|Apache-2.0}}
SLF4J	Java	{{open source\|MIT}}
Spring Batch	Java	{{open source\|Apache 2.0}}
Spring Framework	Java	{{open source\|Apache 2.0}}
StAX	Java	{{open source\|Apache-2.0}}
Standard Widget Toolkit	Java	{{open source\|EPL-2.0}}
Swing	Java	{{open source\|GPL-2.0-or-later}}
Thymeleaf	Java	{{open source\|Apache 2.0}}
Verax IPMI	Java	{{open source\|GPL-3.0}}
XStream	Java	{{open source\|Apache 2.0}}
BioRuby	Ruby	{{open source\|GPL-2.0}}
Eulimhttps://rubydoc.info/gems/eulim	Ruby	{{open source\|MIT}}
eRuby	Ruby	{{open source\|MIT}}
Haml	Ruby	{{open source\|MIT}}
Nokogiri	Ruby	{{open source\|MIT}}
RSpec	Ruby	{{open source\|MIT}}
RubyGems	Ruby	{{open source\|Ruby License}}
Ruby on Rails	Ruby	{{open source\|MIT}}
Sinatra	Ruby	{{open source\|MIT}}
ADOdb	PHP	{{open source\|LGPL}}
AmfPHP	PHP	{{open source\|GPL}}
Composer	PHP	{{open source\|MIT}}
Doctrine	PHP	{{open source\|MIT}}
Guzzle	PHP	{{open source\|MIT}}
Laravel	PHP	{{open source\|MIT}}
Laminas	PHP	{{open source\|MIT}}
li3	PHP	{{open source\|MIT}}
PHPMailer	PHP	{{open source\|LGPL}}
RedBeanPHP	PHP	{{open source\|BSD}}
Simple Cloud API	PHP	{{open source\|Apache 2.0}}
SimpleXML	PHP	{{open source\|PHP}}
Symfony	PHP	{{open source\|MIT}}
Twig	PHP	{{open source\|BSD}}
XHP	PHP, Hack	{{open source\|MIT}}
Rocket	Rust	{{open source\|MIT}}
Rustls	Rust	{{open source\|Apache License 2.0}}
Tokio	Rust	{{open source\|MIT}}
Standard ML Basis Library	Standard ML	{{open source\|MIT}}
FCL-Web	Pascal	{{open source\|GPL-2.0}}
fpGUI	Pascal	{{open source\|GPL-2.0}}
Turbo Vision	Pascal, C++	{{open source\|MPL-1.1}}
Widgetset	Pascal	{{open source\|GPL-2.0}}
Free Component Library	Object Pascal	{{open source\|GPL}}
FireMonkey	Delphi, C++	{{open source\|not available}}
Free Pascal Runtime Library	Object Pascal, Delphi	{{open source\|GPL}}
Lazarus Component Library	Object Pascal	{{open source\|GNU GPL, GPLv2, LGPL, MPL.[https://github.com/graemeg/lazarus/blob/upstream/COPYING.txt copying.txt] on github.com}}
GNU lightning	Assembly language, C	{{open source\|GPL-3.0}}
Libffi	Assembly language, C	{{open source\|MIT}}
Basic Linear Algebra Subprograms (BLAS)	Fortran, C, R	{{open source\|BSD, GPL, LGPL}}
LAPACK	Fortran, C	{{open source\|BSD}}
Dart core libraries	Dart	{{open source\|BSD-3-Clause}}
GORM	Go	{{open source\|MIT}}
Haskell Platform	Haskell	{{open source\|BSD}}
HaXml	Haskell	{{open source\|BSD-3-Clause}}
Parsec (parser)	Haskell	{{open source\|MIT}}
QuickCheck	Haskell	{{open source\|BSD-3-Clause}}
wxHaskell	Haskell	{{open source\|BSD-3-Clause}}
Haxe library	Haxe	{{open source\|MIT License}}
INTLAB	MATLAB, GNU Octave	{{open source\|GPL-3.0}}
Torch	Lua	{{open source\|MIT}}
Flux	Julia	{{open source\|MIT}}
Owl Scientific Computing	OCaml, C	{{open source\|Apache-2.0}}
BioPerl	Perl	{{open source\|GPL-1.0}}
CPAN	Perl	{{open source\|Artistic-1.0}}
CGI.pm	Perl	{{open source\|Artistic License 2.0 or GPL}}
DBIx::Class	Perl	{{open source\|MIT}}
Gtk2-Perl	Perl	{{open source\|LGPL}}
Mojolicious	Perl	{{open source\|MIT}}
Moose	Perl	{{open source\|MIT}}
Perl Data Language	Perl	{{open source\|GPL-3.0}}
Perl DBI	Perl	{{open source\|Artistic License 1.0 or GPL}}
Perl Object Environment	Perl	{{open source\|GPL-2.0}}
Template Toolkit	Perl	{{open source\|GPL-1.0 or Artistic License 2.0}}
DESeq2	R	{{open source\|BSD-3}}
igraph	R, Python, C, Ruby, MATLAB	{{open source\|GPL-2.0}}
LIBSVM	R	{{open source\|LGPL-3.0}}
R package	R	{{open source\|GPL-2.0}}
rnn	R	{{open source\|MIT}}
Common Lisp Interface Manager	Common Lisp	{{open source\|LGPL}}
Common Lisp library	Common Lisp	{{open source\|LGPL-2.1 and others}}
Chicken eggs	Chicken Scheme	{{open source\|BSD}}
Perfect	Swift	{{open source\|Apache-2.0}}
Vapor	Swift	{{open source\|MIT}}

External links

[https://en.cppreference.com/w/cpp/links/libs List of open-source C++ libraries]
https://go.dev/wiki/Projects - Go libraries
[https://cran.r-project.org/web/packages/available%20packages%20by%20name.html CRAN] - Comprehensive R Archive Network
[https://software.nasa.gov/software/category/all/aw/15/library NASA open-source libraries]