The following people have authored packages that are distributed with Macaulay2:
Hirotachi Abo, Michael Adamer, Ashleigh Adams, Tair Akhmejanov, Davide Alberelli, Ayah Almousa, Colin Alstad, Luca Amata, Carlos Amendola, Katie Ansaldi, Elizabeth Arnold, Hector Baños, Fereshteh Bahadorykhalily, Taylor Ball, Mary Barker, Roberto Barrera, Brett Barwick, Dan Bates, Erin Bela, Christine Berkesch, David Berlekamp, Daniel Irving Bernstein, René Birkner, Sankhaneel Bisui, Janko Boehm, Mats Boij, Alberto F. Boix, Adam Boocher, Christian Bopp, Ada Boralevi, Nikita Borisov, Viktoriia Borovik, Nicolás Botbol, Hans-Christian Graf v. Bothmer, C.J. Bott, Thomas Brazelton, Michael K. Brown, Juliette Bruce, Taylor Brysiewicz, Jack Burkart, Michael Burr, Laurent Busé, Nathaniel Bushek, Andrew Bydlon, Michael Byrd, Baptiste Calmès, Baptiste Calmes, Abraham Martin del Campo, Eduardo Camps, Edward Carter, Justin Chen, Henry Chimal-Dzul, Lars Winther Christensen, Yairon Cid-Ruiz, Diego Cifuentes, Carmelo Cisto, Oliver Clarke, Andrew Conner, Shelby Cox, Charley Crissman, Marilena Crupi, Mike Cummings, Ferran Dachs-Cadefau, Aaron Dall, Hiep Dang, Ruth Davidson, Wolfram Decker, Graham Denham, Papri Dey, Michael DiPasquale, Jane Doe, Eliana Duarte, Manuel Dubinsky, Timothy Duff, David Eisenbud, Some documentation added by Daniel Rostamloo and David Eisenbud, Drew Ellingson, Thomas Enkosky, Daniel Erman, Frenly Espino, Chris Eur, Daniele Faenzi, Luigi Ferraro, Gunnar Floystad, Chris Francisco, Federico Galetto, Patricio Gallardo, Francesco Galuppi, Francesca Gandini, Jordy Lopez Garcia, Florian Geiss, Courtney George, Courtney Gibbons, Kriti Goel, Leah Gold, Steve Goldstein, Sean Grate, Daniel R. Grayson, Nathan Grieve, Eloisa Grifo, Elizabeth Gross, Tom Hagedorn, Zhaobo Han, Marc Harkonen, Corey Harris, Pamela Harris, S. Hamid Hassanzadeh, Thomas Hawes, Lauren Cranton Heller, Martin Helmer, Daniel Hernández, Ben Hersey, Cvetelina Hill, Chris Hillar, Franziska Hinkelmann, Andreas Hochenegger, Andrew Hoefel, Michael Hoff, Bradford Hovinen, Hang Huang, Daoji Huang, Amy Huang, Genevieve Hummel, Craig Huneke, Nicholas Iammarino, David Cook II, Nathan Ilten, Alexandru Iosif, Iman Bahmani Jafarloo, Rizwan Jahangir, Caroline Jansen, Delio Jaramillo-Velez, Anders Nedergaard Jensen, Zhan Jiang, Parker Joncus, Kristine Jones, Christine Jost, Zhibek Kadyrsizova, Gesa Kaempf, Thomas Kahle, Gregorz Kapustka, Michal Kapustka, Fatemeh Tarashi Kashani, Lars Kastner, Mordechai Katzman, Joe Kileel, Yeongrak Kim, Youngsu Kim, Patricia Klein, Kathlen Kohn, Daniel Kosmas, Jakob Kröker, Robert Krone, Olga Kuznetsova, Clas Löfwall, Adam LaClair, Sara Lamboglia, Robert Laudone, Jackson Leaman, Kisun Lee, Paolo Lella, Douglas A. Leonard, Anton Leykin, Colby Long, Michael Loper, Hiram H. Lopez, Joel Louwsma, Anders Lundman, Samuel Lundqvist, Yuyuan Luo, Antonio Macchia, Diane Maclagan, Sarasij Maitra, Sara Malec, Devlin Mallory, Kelly Maluccio, Sonja Mapes, Stefano Marseglia, Boyana Martinova, Cesar Massri, Matthew Mastroeni, Joseph McDonough, Laura Menini, Ariel Molinuevo, Jonathan Montaño, Han-Bom Moon, Frank Moore, Michael Morrow, Maral Mostafazadehfard, Harshit J Motwani, Vivek Mukundan, Francesco Navarra, Navid Nemati, Thai Nguyen, Xianglong Ni, Jonathan Niño, Nathan Nichols, Max Nitsche, Augustine O'Keefe, Alessandro Oneto, Wern Juin Gabriel Ong, Richard Osborn, Tomas Pajdla, Stavros Papadakis, Pablo A. Parrilo, Ethan Partida, Dylan Peifer, Matthew Perkins, Michael Perlman, Lars Petersen, Viktor Petrov, Sonja Petrovic, Helfried Peyrl, Brian Pike, Erika Pirnes, Roser Homs Pons, Sorin Popescu, Corrado Possieri, Luis David Garcia Puente, Federico Quallbrunn, Claudiu Raicu, Ritvik Ramkumar, Kristian Ranestad, Daniel Robertz, Elina Robeva, Marcus Robinson, Jose Israel Rodriguez, Dan Roozemond, Sudeshna Roy, Yairon Cid Ruiz, Steven V Sam, Alessio Sammartano, Pierpaola Santarsiero, Joao Pedro Santos, Mahrud Sayrafi, Hal Schenck, Frank-Olaf Schreyer, Karl Schwede, Alexandra Seceleanu, Bernard Serbinowski, Elima Shehu, Lily Silverstein, Deepak Sireeshan, Joseph W. Skelton, Gregory G. Smith, Ben Smith, Daniel Smolkin, Dan Smolkin, Bart Snapp, Aleksandra Sobieska, Christof Soeger, Jeff Sommars, Jieao Song, Ivan Soprunov, Frank Sottile, Gustav Sædén Ståhl, Giovanni Staglianò, Dumitru Stamate, Nathaniel Stapleton, Despina Stasi, Avi Steiner, AJ Stewart, Michael E. Stillman, Branden Stone, Stein A. Strømme, Alexander I. Suciu, Seth Sullivant, Joe Suzuki, Dave Swinarski, David Swinarski, Andrew Tawfeek, Amelia Taylor, Zach Teitler, Pedro Teixeira, Antonio Tornambe, Doug Torrance, Alvise Trevisan, Paolo Tripoli, Harrison Tsai, Ettore Teixeira Turatti, Adam Van Tuyl, Ravi Vakil, Jim Vallandingham, Keller VandeBogert, Mauricio Velasco, Oana Veliche, Alan A. Veliz-Cuba, German Vera, J. K. Verma, Jan Verschelde, Thanh Vu, Robert Walker, Elise Walker, Gwyn Whieldon, Jay White, Amy Wiebe, Dane Wilburne, Tobias Windisch, Emily Witt, Carolyn Yackel, Thomas Yahl, Jay Yang, Zhaoning Yang, Stephanie Yang, Yuhui (Wei) Yao, Teresa Yu, Josephine Yu, Beihui Yuan, Monica Yun, Magdalena Zajaczkowska, Sara Jamshidi Zelenberg, Mengyuan Zhang, Tanner Zielinski, Mikhail Zinin, Paul Zinn-Justin, Jacob Zoromski, Alexandre Zotine.