WordPress 5.9 comes with some awesome, worldview-changing rights courtesy of its license, the GPL.
The 1st Freedom
To run the program for any purpose.
The 2nd Freedom
To study how the program works and change it to make it do what you wish.
The 3rd Freedom
To redistribute.
The 4th Freedom
To distribute copies of your modified versions to others.
WordPress grows when people like you tell their friends about it, and the thousands of businesses and services that are built on and around WordPress share that fact with their users. We’re flattered every time someone spreads the good word, just make sure to check out our trademark guidelines first.
Every plugin and theme in WordPress.org’s directory is 100% GPL or a similarly free and compatible license, so you can feel safe finding plugins and themes there. If you get a plugin or theme from another source, make sure to ask them if it’s GPL first. If they don’t respect the WordPress license, we don’t recommend them.
Noteworthy Contributors
Matt MullenwegRelease Lead
Tonya MorkRelease Lead
Robert AndersonRelease Lead
George MamadashviliRelease Lead
Jean-Baptiste Audras
Marcus Kazmierczak
Kjell Reigstad
Jeff Ong
Josepha Haden
Mary Baum
Abha Thakor
Anne McCarthy
Piotrek Boniu
Jonathan Bossenger
Ahmed Chaion
Milana Cap
Matias Ventura
Sergey Biryukov
Juliette Reinders Folmer
Jonathan Desrosiers
Riad Benguella
Nik Tsekouras
Joen Asmussen
Stephen Bernhardt
Marco Ciampini
Peter Wilson
Colin Stewart
Jonny Harris
Core Contributors to WordPress 5.9
2linctools, Aaron D. Campbell, Aaron Jorbin, Aaron Robertshaw, abesell132, acosmin, Adam – WPMU DEV Support, Adam Bosco, Adam Morgan, Adam Silverstein, Addie, Adil Ali, aduth, Aezaz Shekh, ajotka, Akash Soni, Akira Tachibana, Alain Schlesser, Alan Jacob Mathew, Alexandru Vornicescu, Alex Concha, alexeydemidov, Alexis Lloyd, Alex Lende, alexstine, AlGala, allilevine, almendron, Amanda Riu, Anand Upadhyay, André, Andrea Fercia, Andrei Draganescu, Andrew Nacin, Andrew Nevins, Andrew Serong, Andy Fragen, andynick, Andy Peatling, Andy Schmidt, Angelika Reisiger, Anjana Vasan, Ankit K Gupta, Ankit Panchal, Anthony Burchell, Anthony Eden, Anthony Ledesma, Antonis Lilis, Anton Vlasenko, arena, Arthur Chu, Ashfame, Ayesh Karunaratne, baelx, Bartlomiej, Beau Lebens, Beda, Benachi, benitolopez, benjamin.anakena, Benjamin Denis, Benjamin Gosset, Bernhard Reiter, bgardner, bijayyadav, BinaryKitten, Birgir Erlendsson (birgire), bobbingwide, Boone Gorges, Brad Jorsch, Bradley Taylor, Brad Parbs, Brandon Kraft, bravokeyl, Brennan Goewert, Brian Richards, bronsonquick, Bruno Ribaric, Brylie Christopher Oxley, Caleb Burks, calebwoodbridge, carepsules, Carike, Carlos Bravo, cdyerkes, Ceyhun Ozugur, Chad, Chiaki, Chintan hingrajiya, Chip Snyder, Chloe Bringmann, Chouby, chriscct7, Chris Klosowski, Christian Tamayo, Christina Workman, Christopher Churchill, Chris Van Patten, clucasrowlands, Collieth Clarke, Collins Agbonghama, Copons, Corey, Cory Hughart, Courtney Robertson, craigfrancis, Crisoforo Gaspar, critterverse, Csaba (LittleBigThings), Dávid Szabó, Daisy Olsen, Damon Cook, Dan Farrow, Daniel Bachhuber, danieldudzic, Daniele Scasciafratte, Daniel Post, Daniel Shaw, Dan Soschin, darerodz, Daria, Daschmi, datagutten, datainterlock, Dave Page, David Anderson, David Baumwald, David Biňovec, David Calhoun, David Gwyer, David Herrera, David Kryzaniak, David Mosterd, David Rozando, David Ryan, davidwebca, Debabrata Karfa, Deepak Lalwani, Denis Yanchevskiy, Dennis Snell, Dhanendran, dhusakovic, DiedeExterkate, Dilip Bheda, dingo-d, Dion Hulse, dlt101, Dominik Schilling, donmhico, Donna Botti, dontgo2sleep, Doug Wollison, dpegasusm, Dr. Ronny Harbich, dratwas, Drew Jaynes, drosmog, dustinrue, ecotechie, ehtis, EkoJR, Emmanuel Hesry, empatogen, Enchiridion, Enej Bajgorić, Enrique Sánchez, erayalakese, Erick Hitter, Eric Malalel, Erik, etoledo, Evan Mullins, Fabian Kägy, Fabian Todt, Faisal Alvi, fedepia, Felipe Elia, Felipe Santos, Felix Arntz, Florian TIAR, FPCSJames, fperdaan, Francesca Marano, Francesco, fullofcaffeine, Gal Baras, Garrett Hyder, Gary Jones, Gary Pendergast, gazchap, generosus, Gennady Kovshenin, George Hotelling, George Stephanis, Gilbert Pellegrom, goldsounds, Govind, Grant M. Kinney, Greg Rickaby, Greg Ziółkowski, Guillaume TURPIN, Héctor Prieto, Hans-Christiaan Braun, haosun, Hareesh, Hasanuzzaman, Hauwa Abashiya, Haz, Henry Wright, herbmiller, Herm Martini, Herre Groen, hilayt24, hirofumi2012, Hitendra Chopda, Hossein Farahani, htmgarcia, Hudson Atwell, Hugh Lashbrooke, hugod, Ian Dunn, ianhayes94, ianmjones, Ignat Georgiev, Igor Benic, ilovecats7, infected, Ipstenu (Mika Epstein), Isaac, ismaeld, J.D. Grimes, Jack Reichert, Jake Spurlock, jakub.tyrcha, James Huff, James Koster, Jam Viet, Jan Thiel, janw.oostendorp, Jason Johnston, Jason R. Johnston, Javier Arce, Javier Casares, Jay Upadhyay, Jean-Philippe, Jeff Bowen, Jeffrey Paul, Jenny Dupuy, Jeremy Felt, Jeremy Herve, Jeremy Scott, Jeremy Yip, Jesús Amieiro, Jesper van Engelen, Jessica Lyschik, Jignesh Nakrani, Joe Dolson, joegasper, Joel James, Joe McGill, John Espiritu, John Godley, John James Jacoby, JohnRDOrazio (CLPTE), john zenith, Jono Alderson, Joost de Valk, Joseph Dickson, Jos Klever, Joy, jsnajdr, JuanMa Garrido, juanruitina, Juhi Saxena, Junaid Bhura, Junko Nukaga, Justin Ahinon, Justin DoCanto, Justin Tadlock, K. Adam White, KafleG, kallookoo, Kalpesh Akabari, kaneva, Kapil Paul, Kelly Choyce-Dwan, Kelly Hoffman, keoshi, Keramot UL Islam, kero, Kerry Liu, keyur5, Kharis Sulistiyono, Knut Sparhell, Koen Van den Wijngaert, Konstantin Obenland, Konstantinos Xenos, kurudrive, kwisatz, Kyle Nel, KZeni, lalitjalandhar, laurelfulford, Laxman Prajapati, leemon, leogermani, Liam Gladdy, liammitchell, Linkon Miyan, linux4me2, Loïc Antignac, Loran A. Rendel, Lucas Karpiuk, lucasw89, lucatume, Luis Felipe Zaguini, Luke Carbis, Luke Cavanagh, luovalabs, lynk, Madalin Gorbanescu, Madison, Maggie Cabrera, Mai, Malae, malthert, manfcarlo, Manisha Makhija, Manzoor Wani, Marek Hrabe, Marin Atanasov, Marius L. J., Mark-k, M Asif Rahman, Mateus Machado Luna, Matt, Matt Chowning, mattoakley, Matt Wiebe, Max, MaxD, Maxime Culea, mclaurent, MEDUSOR, Meg Phillips, Meher Bala, Mel Choyce-Dwan, mgol, Micah Wood, Michael Adams (mdawaffe), Michael Beckwith, Michael Burridge, Michael Nelson, Michal Czaplinski, Michel – xiligroup dev, Miguel Fonseca, mikaelmayer, Mike Jolley (a11n), Mike Schroder, Milan Dinić, Minal Diwan, mirka, mjaschen, mjulian7, mmxxi, moch11, Mohammad Rockeybul Alam, moto hachi, mqudsi, mreishus, mrjoeldean, mtoensing, Muhammad Arslan, Muhammad Faizan Haidar, Musab Shakeel, Mustaque Ahmed, Nadir Seghir, Namith Jawahar, Naoko Takano, NateWr, Ned Zimmerman, NettSite, Nicholas Garofalo, nickcernis, Nick Diego, Nick Halsey, Nico, Nidhi Jain, Niels Lange, Nikhil Chavan, nlpro, ockham, Olga Gleckler, Oliver Campion, Omar Alshaker, Omar Reiss, opr18, Outzen Larkin, Ov3rfly, ovann86, ovidiul, Paal Joachim Romdahl, page-carbajal, palmiak, Pankaj Mohale, Pascal Birchler, Patrick B, Paul Bearne, Paul Biron, Paul Bunkham, Paul Kevin, Paulo Pinto, Paul Schreiber, Paul Von Schrottky, pbking, Pedro Mendonça, pepe, Petter Walbø Johnsgård, Philip Jackson, Phil Johnston, Pierre Gordon, Pieterjan Deneys, Pooja Derashri, powerbuoy, praem90, Pramod Jodhani, Presskopp, presstoke, procodewp, psealock, psufan, pwtyler, Rachel Baker, Radixweb, Rahul Mehta, ralucastn, Ramon Ahnert, ramonopoly, ravipatel, Rehan Ali, Renatho (a11n), retrofox, Rian Rietveld, Richard Foley, richards1052, Rich Tabor, Rick Curran, Rishabh Budhiraja, Riyadh Ahmed, rmartinezduque, robertght, robtarr, Rodrigo Arias, Rohan Rawat, Rohan Sharma, Ronak Ganatra, Roxy Kohilakis, Ruslan, rviscomi, Ryan Welcher, Sébastien SERRE, Sören Wrede, Sabbir Hasan, Sabri Bouchaala, Safirul Alredha, Samir Shah, Samuel Wood (Otto), Sandip Mondal – a11n, Sanket Chodavadiya, Sarah Norris, sarayourfriend, Sathiyamoorthy V, savicmarko1985, Sayedul Sayem, Scott Buscemi, scribu, scruffian, Sean McMillan, Sebastian Pisula, Segayuu, Sergio Cinos, SergioEstevao, Shaharyar Afzal, shaunandrews, Shazahanul Islam Shohag, shimon246, Shital Marakana, Shiva Poudel, siddharth, Siddharth Thevaril, siliconforks, simonhammes, Siobhan, Siobhan, sirreal, sjlevy, skunkbad, Smit Rathod, snapfractalpop, Sourov Roy, S Page, spytzo, ssergei, stacimc, Stefano Minoia, Stefanos Togoulidis, Stephen Edgar, Stephen Rider, Steve Dufresne, stevegs, Steve Henty, Storm Rockwell, Sybre Waaijer, Synchro, szaqal21, Taco Verdonschot, Takahashi Fumiki, Tammie Lister, Tara King, Tarei King, Tellyworth, terraling, Terri Ann, Tetsuaki Hamano, theMikeD, Thierry Muller, Thijs Hulshof, Thimal Wickremage, thisiswilliam, Thomas Patrick Levy, timlappe, Timothy Jacobs, titsmaker, tjcafferkey, tmatsuur, TobiasBg, tobifjellner (Tor-Bjorn Fjellner), Tomek, Tomoki Shimomura, Tony G, Tony Tahmouch, Toro_Unit (Hiroshi Urabe), Torsten Landsiedel, Tracy, Travis Northcutt, tubys, Tung Du, twstokes, Udit Desai, umesh84, Utpol Deb Nath, Venkat Raj, versusbassz, verybg, Vicente Canales, Viktor Szépe, Vishit Shah, Vlad T, Vondelphia.com, vortfu, wb1234, WebMan Design | Oliver Juhas, Wes Theron, Weston Ruter, WFMattR, William Earnhardt, williampatton, Will Skora, wojsmol, woodyhayday, wpnomad a11n, wpweaver, wp_kc, Yagnik Sangani, Yui, Yvette Sonneveld, Zebulan Stanphill, and zoiec.
External Libraries
Babel Polyfill, Backbone.js, Class POP3, clipboard.js, Closest, CodeMirror, Color Animations, getID3(), FormData, Horde Text Diff, hoverIntent, imgAreaSelect, Iris, jQuery, jQuery UI, jQuery Hotkeys, jQuery serializeObject, jQuery.query, jQuery.suggest, jQuery UI Touch Punch, json2, Lodash, Masonry, MediaElement.js, Moment, PclZip, PemFTP, phpass, PHPMailer, Plupload, random_compat, React, Redux, Requests, SimplePie, The Incutio XML-RPC Library, Thickbox, TinyMCE, Twemoji, Underscore.js, whatwg-fetch, and zxcvbn.